UltraCrete QC10 F: Rapid Set Flowable Concrete
About the product
UltraCrete QC10 F is a rapid set, fibre-modified flowable concrete designed for backfilling around manhole frames and gullies, and for surface repairs. Sets in 10–20 minutes and open to traffic in just 90 minutes. Suitable from 30mm to 500mm in one pass.
UltraCrete QC10 F: Rapid Set Flowable Concrete available in a 25kg plastic bag
Got a question about QC10 F? Download the technical datasheet (pdf) or see our comprehensive FAQs. Otherwise get in touch and we'll get back to you by email or phone as soon as we can. Or alternatively, call ☎️ 0330 122 1025 – we’re a small team, but happy to help. 😊✨
Calculate required quantity
UltraCrete QC10 F: Rapid Set Flowable Concrete
See full delivery info →
For Highlands, Guernsey, Jersey, Isle of Man, and Isle of Wight – call 0330 122 1025.
See full delivery info →
For Highlands, Guernsey, Jersey, Isle of Man, and Isle of Wight – call 0330 122 1025.
How much you will need?
Technical information
- Workability: 5 – 10 minutes
- Set time: 10 – 20 minutes
- Depth: 30mm – 500mm
- Density: 2300kg/m³
- Yield: approximately 12 litres per 25kg bag
- Colour: grey (colour variation may occur as with all raw materials; this does not affect consistency or product characteristics)
- Size: 25kg plastic bag (56 units per pallet)
- Temperature: do not use below 0°C or above 30°C without seeking advice
- Cleaning: remove from tools and equipment with clean water immediately after use. Cured material can be removed mechanically.
Compressive strength (N/mm²)
| Time | Strength |
|---|---|
| 90 minutes | 20.00 |
| 1 day | 35.00 |
| 7 days | 50.00 |
| 28 days | 60.00 |
Tensile strength (N/mm²)
| Time | Strength |
|---|---|
| 1 day | 1.50 |
| 7 days | 2.50 |
| 28 days | 3.00 |
Flexural strength (N/mm²)
| Time | Strength |
|---|---|
| 1 day | 4.50 |
| 7 days | 5.00 |
| 28 days | 6.00 |
How to prepare surfaces for QC10 F
All surfaces should be free from oil, grease, dust or any other visible contaminants.- Remove all loose particles and work on a sound substrate.
- Pre-soak the area with clean water prior to application to aid bond.
- Remove ponded water before applying the product. Good concrete practice should always be observed to enable the mix to be placed into position within 4 minutes.
How to mix QC10 F Rapid Set Flowable Concrete
- Can be mixed mechanically or by hand.
- If by hand, ensure that the mixing is vigorous.
- Mix the inner bag containing the cement with the sand/aggregate.
- Formulated to be mixed to a smooth flowable consistency.
- It is advisable to add a maximum of 2 litres of water initially, mix and if required, add up to a further 0.25 litres.
- It is essential that this product not be over-watered. The addition of excessive water will result in slower strength gain, reduced final compressive strength and the possibility of shrinkage cracking.
- Sand/aggregate contains moisture and the volume of water required will vary depending on the moisture content of the aggregate.
- Mix only enough material to apply within 4 minutes.
- Never remix or add water.
- If the product needs to be applied to walls then the water content can be reduced to obtain a stiffer consistency.
How to apply QC10 F Rapid Set Flowable Concrete
- Pour mixed QC10 F into place (if required lightly trowel to ensure good contact with edges), 60mm below the required surface.
- Once the material has reached an initial set, all horizontal surfaces of the reinstatement, including the ironwork, should be sprayed with Ultracrete SCJ. This will prevent the ingress of water into the reinstatement and promote a good bond. Ensure all vertical substrates are fully covered.
- Clean any mixing equipment with water immediately after use.
About the product
UltraCrete QC10 F is a rapid set, fibre-modified flowable concrete designed for backfilling around manhole frames and gullies, and for surface repairs. Sets in 10–20 minutes and open to traffic in just 90 minutes. Suitable from 30mm to 500mm in one pass.
UltraCrete QC10 F: Rapid Set Flowable Concrete available in a 25kg plastic bag
Got a question about QC10 F? Download the technical datasheet (pdf) or see our comprehensive FAQs. Otherwise get in touch and we'll get back to you by email or phone as soon as we can. Or alternatively, call ☎️ 0330 122 1025 – we’re a small team, but happy to help. 😊✨
UltraCrete QC10 F: Rapid Set Flowable Concrete
UltraCrete QC10 F is one of the best rapid set flowable concretes on the market — an excellent example of a fibre-modified rapid setting concrete that genuinely delivers where it counts. It's a product our customers consistently come back to tell us they're delighted with: pours into place around complex ironwork, compensates for shrinkage, and has carried a HAPAS approval since 2005.
Sets in 10–20 minutes. Workability: 5–10 minutes. Open to traffic in 90 minutes. 20N/mm² compressive strength after 90 minutes. Suitable for applications from 30mm to 500mm in a single pass — QC10 F is a professional-strength rapid set concrete specifically formulated as a flowable backfill concrete for manhole frames and gullies, and equally capable as a rapid set concrete for surface repairs, gate posts and heavy-duty post installation.
We're a small, family-run business — I'm Cleo, the owner, with over 25 years in the construction industry working with businesses including Tarmac and Instarmac. I work alongside a team of incredibly knowledgeable and caring individuals, and between us we've seen a lot of rapid set concretes come and go.
For manhole backfill concrete, gully reinstatement, ironwork backfill, rapid set concrete for surface repairs and trench repairs, and flowable concrete for gate posts and heavy-duty post installation, QC10 F is our go-to recommendation. Its flowable consistency means it self-levels around ironwork and post bases without the need for heavy compaction — making it faster to place and more reliable in confined excavations. For thick-section repairs and haunching where a stiffer mix is preferred, see QC10.
Who Uses UltraCrete QC10 F?
Highways Contractors & Local Authorities
QC10 F is a go-to rapid set backfill concrete for highways contractors and local authority works teams backfilling around manhole frames, gully pots and access covers. HAPAS approved since 2005 and part of the UltraCrete Accredited Reinstatement Specification (UCARS), it provides the specification confidence required for compliant reinstatement on public highway. Open to traffic in 90 minutes — critical for busy road and footway reinstatements.
Utilities & Telecoms Subcontractors
Gas, water, electricity and telecommunications contractors use QC10 F as their rapid concrete for ironwork reinstatement and manhole frame backfill following utility works. Its flowable nature makes it particularly well suited to backfilling around complex frame geometries and trench reinstatements where a stiffer mix would be difficult to place. Open to traffic in 90 minutes — essential when working to tight reinstatement windows on busy roads and footways.
Facilities & Maintenance Contractors
Maintenance contractors working across retail parks, supermarkets, logistics sites and industrial estates use QC10 F for gully and manhole frame backfill and rapid set concrete for surface repairs where speed and minimal disruption are critical. Mixes with water only on site and is open to traffic in 90 minutes.
Specialist Installation & Groundworks Contractors
QC10 F is used by specialist groundworks and installation contractors who need a fast setting concrete for backfilling around frames, ducts and post bases following excavation through existing driveways, roads and paved surfaces. This includes:
- Electric gate and access-control installers — rapid set flowable concrete for post and frame foundations where a self-levelling concrete speeds up installation and reduces compaction effort.
- EV charging contractors — flowable backfill concrete for cable duct routes and charging point bases across car parks and driveways.
- Street lighting and electrical contractors — rapid set backfill concrete for column bases and ducts in roads and footways.
- Drainage and water contractors — flowable backfill concrete for gully pots, drainage frames and connections requiring a rapid set concrete for trench repairs.
- Barrier, bollard and security installers — fast setting concrete for barrier posts and bollard bases where a flowable mix aids placement around foundation steelwork.
Homeowners & Private Road Users
QC10 F can also be used for surface repairs on driveways, shared access roads and private estate roads. Note: patching and surface repairs require use of Ultrascape Pro Prime Slurry Primer prior to application. If you’re unsure whether QC10 F is right for your application, contact us or call 0330 122 1025 — we’re always happy to help.
QC10 F for Electric Gate Installers
If you install electric gates and automated access systems, QC10 F is worth knowing about. Electric gate installation often requires excavating through existing driveways, access roads, car parks and paved surfaces to install power cables, control wiring, ducts and drainage — followed by reinstating the surface and setting gate posts into concrete foundations.
QC10 F is specifically suited to this type of work because:
- It's flowable — pours easily around gate post bases and into confined excavations without needing tamping or compaction, reducing installation time and effort
- It sets in 10–20 minutes — so you’re not waiting around on site before moving to the next stage of the installation
- It reaches 20N/mm² compressive strength in 90 minutes — strong enough to commission and test gate movement significantly sooner than conventional concrete
- It’s suitable from 30mm to 500mm depth in one pass — covering the range of post foundation depths typically encountered in gate installation
- Instarmac confirms QC10 F is suitable for heavy-duty post installation — giving you manufacturer-backed confidence for specifying it on gate post jobs
QC10 F for Gate Posts, Fence Posts and Heavy-Duty Post Installation
Beyond electric gate installers, QC10 F is a strong choice as a rapid set concrete for fence posts, barrier posts and any heavy-duty post installation where speed and flowability matter. Instarmac identifies QC10 F as suitable for heavy-duty post installation, making it equally relevant for:
- Rapid set concrete for fence posts and barrier posts
- Concrete for heavy-duty posts where rapid strength gain is required
- Fast setting concrete for bollard and sign post installation
- Flowable concrete for posts where a poured rather than tamped mix is preferred
Sets in 10–20 minutes. Open to traffic and operational in 90 minutes. Suitable from 30mm to 500mm depth in one pass.
Features & Benefits
- HAPAS approved since 2005
- 20N/mm² compressive strength in 90 minutes
- Sets in 10–20 minutes — one of the fastest setting concretes available
- Open to traffic in 90 minutes
- Workability: 5–10 minutes
- Shrinkage compensated
- Fibre modified for enhanced tensile and flexural performance
- Flowable consistency — self-levels around complex ironwork and post bases
- Simply add water on site to form a high-strength concrete
- Suitable for applications from 30mm – 500mm in one pass
- Approved for use on the London Underground and Overground
- NBS Source registered for ease of specification
- UltraCrete Accredited Reinstatement Specification (UCARS) product
- 56 units per pallet
Applications
QC10 F rapid set flowable concrete is ideal for:
- Manhole backfill concrete and access cover reinstatement
- Concrete for manhole frames and gully reinstatement
- Ironwork backfill concrete and rapid concrete for ironwork reinstatement
- Rapid set concrete for surface repairs (with Pro Prime Slurry Primer)
- Rapid set concrete for trench repairs and utility reinstatement
- Rapid set concrete for haunching reinstatement
- Flowable backfill concrete from 30mm to 500mm in one pass
- Rapid set concrete for electric gate posts and access-control post bases
- Rapid set concrete for gate posts, fence posts and barrier posts
- Fast setting concrete for heavy-duty post installation
- Highway reinstatement requiring open-to-traffic in 90 minutes
UltraCrete Approved Manhole Reinstatement System
QC10 F is part of the UltraCrete Approved Manhole Reinstatement System — a complete range of HAPAS-approved products for roads, footways and carriageways. The full system includes:
| Product | Use |
|---|---|
| UltraCrete M45 | Rapid strength bedding mortar |
| UltraCrete M60 | Rapid strength bedding mortar |
| UltraCrete M60 F | Fibre-reinforced bedding mortar |
| UltraCrete M90 | High strength bedding mortar |
| UltraCrete QC10 | Rapid strength concrete |
| UltraCrete QC10 F | Rapid set flowable concrete (this product) |
| UltraCrete SCJ Seal & Tack Coat | Seal & tack coat for reinstatement edges |
| UltraCrete IRR 6mm | Instant road repair — 6mm aggregate |
| UltraCrete IRR 10mm | Instant road repair — 10mm aggregate |
| UltraCrete Tough Patch Rapid | Rapid surface repair |
| UltraCrete Enviro Mastic | Joint sealant |
| Instaband ECO | Thermoplastic overbanding tape |
QC10 F vs QC10 — Which Do I Need?
| QC10 F | QC10 | |
|---|---|---|
| Type | Flowable, fibre-modified | Standard rapid strength |
| Primary use | Manhole frame & gully backfill, surface repairs, gate/fence posts | Thick-section repairs, haunching, post/sign installation |
| Depth range | 30–500mm | 30–250mm |
| Open to traffic | 90 minutes | 2 hours |
| Consistency | Flowable — pours into place | Workable — tamped or floated |
| Fibre modified | Yes | No |
Frequently Asked Questions about UltraCrete QC10 F
I'm Cleo, owner of The Paving Experts, with over 25 years in the construction industry working with businesses including Tarmac and Instarmac. I work alongside a small team of incredibly knowledgeable and caring individuals who share the same passion for getting it right. The FAQ answers below come from the questions we're asked every single day.
What is QC10 F?
UltraCrete QC10 F is a rapid-set, flowable, fibre-modified concrete designed for backfilling around manhole frames and gullies, as well as surface repairs. Its flowable consistency makes it quick and straightforward to pour into place.
How quickly does QC10 F set?
QC10 F has a set time of approximately 10–20 minutes, with a working time of around 5–10 minutes. Temperature can affect setting times, so contractors should always follow the current technical guidance.
How long before QC10 F can be trafficked?
QC10 F can be opened to traffic after approximately 90 minutes, making it useful for time-critical highway and reinstatement work where minimising disruption is important.
What is QC10 F used for?
QC10 F is used for manhole and ironwork backfilling, surface repairs, trench repairs and other applications where a rapid-setting concrete is required. It is also suitable for heavy-duty post installation, including electric gate posts, fence posts and barrier posts.
Can QC10 F be used for electric gate posts?
Yes. QC10 F is suitable for heavy-duty post installation, making it a practical choice for electric gate installers. Its flowable consistency makes it easy to pour around gate post bases without tamping, while its rapid strength gain — 20N/mm² in 90 minutes — allows contractors to commission and test gate movement significantly sooner than conventional concrete would allow. Instarmac confirms QC10 F is suitable for heavy-duty post installation.
How strong is QC10 F after 90 minutes?
QC10 F achieves a compressive strength of 20N/mm² after 90 minutes, providing rapid strength gain for repairs and reinstatement work.
Is QC10 F a flowable concrete?
Yes. QC10 F is specifically formulated as a flowable rapid-set concrete. It can be poured into position, making it useful for backfilling around manhole frames, gullies, posts and other areas where access can be difficult.
What depth can QC10 F be applied?
QC10 F can be applied at depths from 30mm to 500mm in one pass, making it suitable for a range of deeper repair and backfilling applications.
Can QC10 F be used for manhole reinstatement?
Yes. QC10 F is designed for backfilling around manhole frames and gullies and forms part of UltraCrete's range of manhole reinstatement materials.
Can QC10 F be used for ironwork reinstatement?
Yes. QC10 F can be used for backfilling around highway ironwork, including manhole frames and gullies. Its rapid setting and early strength make it particularly useful where repairs need to be completed quickly.
Can QC10 F be used for trench repairs?
Yes. QC10 F can be used for suitable trench and surface repair applications where a rapid-setting, flowable concrete is required. The application should be assessed against the specific site conditions and product guidance.
Can QC10 F be used for haunching?
QC10 F can be used for suitable haunching and reinstatement applications. Its flowable consistency allows it to be poured into position, while its rapid strength gain helps reduce downtime.
Can QC10 F be used for gate posts and fence posts?
Yes. QC10 F is suitable for heavy-duty post installation, making it a useful option for contractors installing gate posts, fence posts, barriers, signs and similar structures where rapid strength gain is important.
Is QC10 F suitable for electric gate installations?
QC10 F can be a practical choice for electric gate installers, particularly when installing heavy-duty gate posts and needing a rapid-setting concrete. Its flowable consistency makes it easy to pour around posts, while its rapid strength gain helps contractors move on with the installation sooner.
What is the difference between QC10 and QC10 F?
Both are rapid-setting UltraCrete concretes, but QC10 F is the flowable, fibre-modified version. QC10 F is designed for applications including backfilling around manhole frames and gullies, while QC10 is a rapid-strength concrete used for thick-section repairs, haunching, ironwork backfilling and post, sign, fence and barrier installation.
How long is the working time for QC10 F?
QC10 F has a working time of approximately 5–10 minutes. Because it sets quickly, contractors should have everything prepared before mixing and work promptly once the material has been mixed.
How do you mix QC10 F?
QC10 F can be mixed by hand or mechanically. Water is added on site to produce a smooth, flowable consistency. It is important not to over-water the product, as excessive water can slow strength gain and reduce final compressive strength.
Can QC10 F be used in cold weather?
QC10 F should ideally be used between 0°C and 30°C. For temperatures outside this range, contractors should contact Instarmac for advice and follow the latest technical guidance.
Is QC10 F shrinkage compensated?
Yes. QC10 F is a shrinkage-compensated concrete, helping it maintain performance during the curing process when correctly mixed and applied.
What size bag does QC10 F come in?
QC10 F is supplied in a 25kg plastic bag, making it practical for contractors carrying out repairs and reinstatement work on site.
Is QC10 F suitable for time-critical repairs?
Yes. Its combination of a 10–20 minute set time, 20N/mm² strength after 90 minutes and 90-minute trafficability makes QC10 F particularly suitable for time-critical repairs where keeping disruption to a minimum is important.
Why use QC10 F instead of conventional concrete?
The main advantage of QC10 F is speed. Conventional concrete can require a much longer curing period before it can be trafficked or loaded. QC10 F achieves 20N/mm² compressive strength in 90 minutes and can be opened to traffic at that point — making it significantly faster for highway, reinstatement and installation work where downtime needs to be minimised.
For technical support, specification help, or bulk pricing, contact our team or call 0330 122 1025 — we’re a small, family-run business and always happy to help.
- Brand: Instarmac
- SKU: TPE-ULTQC10FBAG
- Weight: 25.0 kg / 55.12 lb
Delivery & Returns Info
Our delivery charges are calculated based on the size and weight of your order. When you add items to your basket, the delivery charges are displayed. Small orders are distributed via courier; larger orders via Pallet Network. Collection is available from our Tamworth depot by request (contact us first to arrange on 0330 122 1025).
Please note, there is a slight surcharge for areas that are outside of our locality, charges calculated at checkout.
| Weight and size | Next Working Day* Order before 1PM (excl. VAT) |
Standard 3-5 Working Day (excl. VAT) |
|---|---|---|
| 0-13KG (1 small bag/tub) |
£14.00 | £9.00 |
| 13.01-25KG (1 large bag/tub) |
£16.00 | £10.00 |
| 25.01-50KG (2 bags/tubs) |
£26.00 | £19.00 |
| 50.01-75KG (3 bags/tubs) |
£36.00 | £28.00 |
| 75.01-100KG (4-5 bags/tubs) |
£46.00 | £37.00 |
| 100.01-249KG (6-9 bags/tubs) |
£60.00 | £45.00 |
| 249.01-750KG (10 bags plus) |
£68.00 | £48.00 |
| 750.01KG plus (30 bags plus) |
£75.00 | £55.00 |
| Full Pallets (56 bags/52 tubs) |
£88.00 | Free of charge |
| Next Working Day delivery (Premium 1-2 Working Day Service) | +avg. £5-10 Extra. Click here for prices |
|---|---|
| Scotland Delivery Service (Deliveries into some parts of Scotland can take 8-10 working days) | Click here for prices |
| Local Delivery & Click & Collect: | Email: orders@thepavingexperts.co.uk |
Delivery Information
- Prices apply to mainland England and Wales. Scottish delivery slight surcharge.
- Orders are packed and dispatched Monday–Friday (excluding weekends & public holidays).
Next Working Day Delivery
- Order before 1PM → same-day dispatch.
- Order after 1PM or on weekends/bank holidays → next working day dispatch.
- You'll receive tracking updates via email/SMS if you provide your details.
Delivery Examples
- Mon before 1PM → Packed Mon, delivered Tue.
- Mon after 1PM → Packed Tues delivered Wed.
- Fri before 1PM → Packed Fri, delivered Mon.
- Fri after 1PM/weekend → Packed Mon, delivered Tues (or Wed after a bank holiday).
- Standard Service: 3–5 working days.
Notes
- Occasional delays due to manufacturing, supply, or courier issues may happen, but we'll keep you informed.
Returns, cancel up to 14 days from date of delivery. Product to be returned in the same condition & packaging. No returns for cementitious & perishable products. You are responsible for the cost of returning goods to The Paving Experts, 20% admin restock fee applies. Need further info, click here.
For further detailed delivery information click here →
For any advice; technical, product, stock or quantity needed, call our team on 0330 122 1025.
Please see our FAQs for more information.
UltraCrete QC10 F: Rapid Set Flowable Concrete
UltraCrete QC10 F is one of the best rapid set flowable concretes on the market — an excellent example of a fibre-modified rapid setting concrete that genuinely delivers where it counts. It's a product our customers consistently come back to tell us they're delighted with: pours into place around complex ironwork, compensates for shrinkage, and has carried a HAPAS approval since 2005.
Sets in 10–20 minutes. Workability: 5–10 minutes. Open to traffic in 90 minutes. 20N/mm² compressive strength after 90 minutes. Suitable for applications from 30mm to 500mm in a single pass — QC10 F is a professional-strength rapid set concrete specifically formulated as a flowable backfill concrete for manhole frames and gullies, and equally capable as a rapid set concrete for surface repairs, gate posts and heavy-duty post installation.
We're a small, family-run business — I'm Cleo, the owner, with over 25 years in the construction industry working with businesses including Tarmac and Instarmac. I work alongside a team of incredibly knowledgeable and caring individuals, and between us we've seen a lot of rapid set concretes come and go.
For manhole backfill concrete, gully reinstatement, ironwork backfill, rapid set concrete for surface repairs and trench repairs, and flowable concrete for gate posts and heavy-duty post installation, QC10 F is our go-to recommendation. Its flowable consistency means it self-levels around ironwork and post bases without the need for heavy compaction — making it faster to place and more reliable in confined excavations. For thick-section repairs and haunching where a stiffer mix is preferred, see QC10.
Who Uses UltraCrete QC10 F?
Highways Contractors & Local Authorities
QC10 F is a go-to rapid set backfill concrete for highways contractors and local authority works teams backfilling around manhole frames, gully pots and access covers. HAPAS approved since 2005 and part of the UltraCrete Accredited Reinstatement Specification (UCARS), it provides the specification confidence required for compliant reinstatement on public highway. Open to traffic in 90 minutes — critical for busy road and footway reinstatements.
Utilities & Telecoms Subcontractors
Gas, water, electricity and telecommunications contractors use QC10 F as their rapid concrete for ironwork reinstatement and manhole frame backfill following utility works. Its flowable nature makes it particularly well suited to backfilling around complex frame geometries and trench reinstatements where a stiffer mix would be difficult to place. Open to traffic in 90 minutes — essential when working to tight reinstatement windows on busy roads and footways.
Facilities & Maintenance Contractors
Maintenance contractors working across retail parks, supermarkets, logistics sites and industrial estates use QC10 F for gully and manhole frame backfill and rapid set concrete for surface repairs where speed and minimal disruption are critical. Mixes with water only on site and is open to traffic in 90 minutes.
Specialist Installation & Groundworks Contractors
QC10 F is used by specialist groundworks and installation contractors who need a fast setting concrete for backfilling around frames, ducts and post bases following excavation through existing driveways, roads and paved surfaces. This includes:
- Electric gate and access-control installers — rapid set flowable concrete for post and frame foundations where a self-levelling concrete speeds up installation and reduces compaction effort.
- EV charging contractors — flowable backfill concrete for cable duct routes and charging point bases across car parks and driveways.
- Street lighting and electrical contractors — rapid set backfill concrete for column bases and ducts in roads and footways.
- Drainage and water contractors — flowable backfill concrete for gully pots, drainage frames and connections requiring a rapid set concrete for trench repairs.
- Barrier, bollard and security installers — fast setting concrete for barrier posts and bollard bases where a flowable mix aids placement around foundation steelwork.
Homeowners & Private Road Users
QC10 F can also be used for surface repairs on driveways, shared access roads and private estate roads. Note: patching and surface repairs require use of Ultrascape Pro Prime Slurry Primer prior to application. If you’re unsure whether QC10 F is right for your application, contact us or call 0330 122 1025 — we’re always happy to help.
QC10 F for Electric Gate Installers
If you install electric gates and automated access systems, QC10 F is worth knowing about. Electric gate installation often requires excavating through existing driveways, access roads, car parks and paved surfaces to install power cables, control wiring, ducts and drainage — followed by reinstating the surface and setting gate posts into concrete foundations.
QC10 F is specifically suited to this type of work because:
- It's flowable — pours easily around gate post bases and into confined excavations without needing tamping or compaction, reducing installation time and effort
- It sets in 10–20 minutes — so you’re not waiting around on site before moving to the next stage of the installation
- It reaches 20N/mm² compressive strength in 90 minutes — strong enough to commission and test gate movement significantly sooner than conventional concrete
- It’s suitable from 30mm to 500mm depth in one pass — covering the range of post foundation depths typically encountered in gate installation
- Instarmac confirms QC10 F is suitable for heavy-duty post installation — giving you manufacturer-backed confidence for specifying it on gate post jobs
QC10 F for Gate Posts, Fence Posts and Heavy-Duty Post Installation
Beyond electric gate installers, QC10 F is a strong choice as a rapid set concrete for fence posts, barrier posts and any heavy-duty post installation where speed and flowability matter. Instarmac identifies QC10 F as suitable for heavy-duty post installation, making it equally relevant for:
- Rapid set concrete for fence posts and barrier posts
- Concrete for heavy-duty posts where rapid strength gain is required
- Fast setting concrete for bollard and sign post installation
- Flowable concrete for posts where a poured rather than tamped mix is preferred
Sets in 10–20 minutes. Open to traffic and operational in 90 minutes. Suitable from 30mm to 500mm depth in one pass.
Features & Benefits
- HAPAS approved since 2005
- 20N/mm² compressive strength in 90 minutes
- Sets in 10–20 minutes — one of the fastest setting concretes available
- Open to traffic in 90 minutes
- Workability: 5–10 minutes
- Shrinkage compensated
- Fibre modified for enhanced tensile and flexural performance
- Flowable consistency — self-levels around complex ironwork and post bases
- Simply add water on site to form a high-strength concrete
- Suitable for applications from 30mm – 500mm in one pass
- Approved for use on the London Underground and Overground
- NBS Source registered for ease of specification
- UltraCrete Accredited Reinstatement Specification (UCARS) product
- 56 units per pallet
Applications
QC10 F rapid set flowable concrete is ideal for:
- Manhole backfill concrete and access cover reinstatement
- Concrete for manhole frames and gully reinstatement
- Ironwork backfill concrete and rapid concrete for ironwork reinstatement
- Rapid set concrete for surface repairs (with Pro Prime Slurry Primer)
- Rapid set concrete for trench repairs and utility reinstatement
- Rapid set concrete for haunching reinstatement
- Flowable backfill concrete from 30mm to 500mm in one pass
- Rapid set concrete for electric gate posts and access-control post bases
- Rapid set concrete for gate posts, fence posts and barrier posts
- Fast setting concrete for heavy-duty post installation
- Highway reinstatement requiring open-to-traffic in 90 minutes
UltraCrete Approved Manhole Reinstatement System
QC10 F is part of the UltraCrete Approved Manhole Reinstatement System — a complete range of HAPAS-approved products for roads, footways and carriageways. The full system includes:
| Product | Use |
|---|---|
| UltraCrete M45 | Rapid strength bedding mortar |
| UltraCrete M60 | Rapid strength bedding mortar |
| UltraCrete M60 F | Fibre-reinforced bedding mortar |
| UltraCrete M90 | High strength bedding mortar |
| UltraCrete QC10 | Rapid strength concrete |
| UltraCrete QC10 F | Rapid set flowable concrete (this product) |
| UltraCrete SCJ Seal & Tack Coat | Seal & tack coat for reinstatement edges |
| UltraCrete IRR 6mm | Instant road repair — 6mm aggregate |
| UltraCrete IRR 10mm | Instant road repair — 10mm aggregate |
| UltraCrete Tough Patch Rapid | Rapid surface repair |
| UltraCrete Enviro Mastic | Joint sealant |
| Instaband ECO | Thermoplastic overbanding tape |
QC10 F vs QC10 — Which Do I Need?
| QC10 F | QC10 | |
|---|---|---|
| Type | Flowable, fibre-modified | Standard rapid strength |
| Primary use | Manhole frame & gully backfill, surface repairs, gate/fence posts | Thick-section repairs, haunching, post/sign installation |
| Depth range | 30–500mm | 30–250mm |
| Open to traffic | 90 minutes | 2 hours |
| Consistency | Flowable — pours into place | Workable — tamped or floated |
| Fibre modified | Yes | No |
Frequently Asked Questions about UltraCrete QC10 F
I'm Cleo, owner of The Paving Experts, with over 25 years in the construction industry working with businesses including Tarmac and Instarmac. I work alongside a small team of incredibly knowledgeable and caring individuals who share the same passion for getting it right. The FAQ answers below come from the questions we're asked every single day.
What is QC10 F?
UltraCrete QC10 F is a rapid-set, flowable, fibre-modified concrete designed for backfilling around manhole frames and gullies, as well as surface repairs. Its flowable consistency makes it quick and straightforward to pour into place.
How quickly does QC10 F set?
QC10 F has a set time of approximately 10–20 minutes, with a working time of around 5–10 minutes. Temperature can affect setting times, so contractors should always follow the current technical guidance.
How long before QC10 F can be trafficked?
QC10 F can be opened to traffic after approximately 90 minutes, making it useful for time-critical highway and reinstatement work where minimising disruption is important.
What is QC10 F used for?
QC10 F is used for manhole and ironwork backfilling, surface repairs, trench repairs and other applications where a rapid-setting concrete is required. It is also suitable for heavy-duty post installation, including electric gate posts, fence posts and barrier posts.
Can QC10 F be used for electric gate posts?
Yes. QC10 F is suitable for heavy-duty post installation, making it a practical choice for electric gate installers. Its flowable consistency makes it easy to pour around gate post bases without tamping, while its rapid strength gain — 20N/mm² in 90 minutes — allows contractors to commission and test gate movement significantly sooner than conventional concrete would allow. Instarmac confirms QC10 F is suitable for heavy-duty post installation.
How strong is QC10 F after 90 minutes?
QC10 F achieves a compressive strength of 20N/mm² after 90 minutes, providing rapid strength gain for repairs and reinstatement work.
Is QC10 F a flowable concrete?
Yes. QC10 F is specifically formulated as a flowable rapid-set concrete. It can be poured into position, making it useful for backfilling around manhole frames, gullies, posts and other areas where access can be difficult.
What depth can QC10 F be applied?
QC10 F can be applied at depths from 30mm to 500mm in one pass, making it suitable for a range of deeper repair and backfilling applications.
Can QC10 F be used for manhole reinstatement?
Yes. QC10 F is designed for backfilling around manhole frames and gullies and forms part of UltraCrete's range of manhole reinstatement materials.
Can QC10 F be used for ironwork reinstatement?
Yes. QC10 F can be used for backfilling around highway ironwork, including manhole frames and gullies. Its rapid setting and early strength make it particularly useful where repairs need to be completed quickly.
Can QC10 F be used for trench repairs?
Yes. QC10 F can be used for suitable trench and surface repair applications where a rapid-setting, flowable concrete is required. The application should be assessed against the specific site conditions and product guidance.
Can QC10 F be used for haunching?
QC10 F can be used for suitable haunching and reinstatement applications. Its flowable consistency allows it to be poured into position, while its rapid strength gain helps reduce downtime.
Can QC10 F be used for gate posts and fence posts?
Yes. QC10 F is suitable for heavy-duty post installation, making it a useful option for contractors installing gate posts, fence posts, barriers, signs and similar structures where rapid strength gain is important.
Is QC10 F suitable for electric gate installations?
QC10 F can be a practical choice for electric gate installers, particularly when installing heavy-duty gate posts and needing a rapid-setting concrete. Its flowable consistency makes it easy to pour around posts, while its rapid strength gain helps contractors move on with the installation sooner.
What is the difference between QC10 and QC10 F?
Both are rapid-setting UltraCrete concretes, but QC10 F is the flowable, fibre-modified version. QC10 F is designed for applications including backfilling around manhole frames and gullies, while QC10 is a rapid-strength concrete used for thick-section repairs, haunching, ironwork backfilling and post, sign, fence and barrier installation.
How long is the working time for QC10 F?
QC10 F has a working time of approximately 5–10 minutes. Because it sets quickly, contractors should have everything prepared before mixing and work promptly once the material has been mixed.
How do you mix QC10 F?
QC10 F can be mixed by hand or mechanically. Water is added on site to produce a smooth, flowable consistency. It is important not to over-water the product, as excessive water can slow strength gain and reduce final compressive strength.
Can QC10 F be used in cold weather?
QC10 F should ideally be used between 0°C and 30°C. For temperatures outside this range, contractors should contact Instarmac for advice and follow the latest technical guidance.
Is QC10 F shrinkage compensated?
Yes. QC10 F is a shrinkage-compensated concrete, helping it maintain performance during the curing process when correctly mixed and applied.
What size bag does QC10 F come in?
QC10 F is supplied in a 25kg plastic bag, making it practical for contractors carrying out repairs and reinstatement work on site.
Is QC10 F suitable for time-critical repairs?
Yes. Its combination of a 10–20 minute set time, 20N/mm² strength after 90 minutes and 90-minute trafficability makes QC10 F particularly suitable for time-critical repairs where keeping disruption to a minimum is important.
Why use QC10 F instead of conventional concrete?
The main advantage of QC10 F is speed. Conventional concrete can require a much longer curing period before it can be trafficked or loaded. QC10 F achieves 20N/mm² compressive strength in 90 minutes and can be opened to traffic at that point — making it significantly faster for highway, reinstatement and installation work where downtime needs to be minimised.
For technical support, specification help, or bulk pricing, contact our team or call 0330 122 1025 — we’re a small, family-run business and always happy to help.
Technical information
- Workability: 5 – 10 minutes
- Set time: 10 – 20 minutes
- Depth: 30mm – 500mm
- Density: 2300kg/m³
- Yield: approximately 12 litres per 25kg bag
- Colour: grey (colour variation may occur as with all raw materials; this does not affect consistency or product characteristics)
- Size: 25kg plastic bag (56 units per pallet)
- Temperature: do not use below 0°C or above 30°C without seeking advice
- Cleaning: remove from tools and equipment with clean water immediately after use. Cured material can be removed mechanically.
Compressive strength (N/mm²)
| Time | Strength |
|---|---|
| 90 minutes | 20.00 |
| 1 day | 35.00 |
| 7 days | 50.00 |
| 28 days | 60.00 |
Tensile strength (N/mm²)
| Time | Strength |
|---|---|
| 1 day | 1.50 |
| 7 days | 2.50 |
| 28 days | 3.00 |
Flexural strength (N/mm²)
| Time | Strength |
|---|---|
| 1 day | 4.50 |
| 7 days | 5.00 |
| 28 days | 6.00 |
How to prepare surfaces for QC10 F
All surfaces should be free from oil, grease, dust or any other visible contaminants.- Remove all loose particles and work on a sound substrate.
- Pre-soak the area with clean water prior to application to aid bond.
- Remove ponded water before applying the product. Good concrete practice should always be observed to enable the mix to be placed into position within 4 minutes.
How to mix QC10 F Rapid Set Flowable Concrete
- Can be mixed mechanically or by hand.
- If by hand, ensure that the mixing is vigorous.
- Mix the inner bag containing the cement with the sand/aggregate.
- Formulated to be mixed to a smooth flowable consistency.
- It is advisable to add a maximum of 2 litres of water initially, mix and if required, add up to a further 0.25 litres.
- It is essential that this product not be over-watered. The addition of excessive water will result in slower strength gain, reduced final compressive strength and the possibility of shrinkage cracking.
- Sand/aggregate contains moisture and the volume of water required will vary depending on the moisture content of the aggregate.
- Mix only enough material to apply within 4 minutes.
- Never remix or add water.
- If the product needs to be applied to walls then the water content can be reduced to obtain a stiffer consistency.
How to apply QC10 F Rapid Set Flowable Concrete
- Pour mixed QC10 F into place (if required lightly trowel to ensure good contact with edges), 60mm below the required surface.
- Once the material has reached an initial set, all horizontal surfaces of the reinstatement, including the ironwork, should be sprayed with Ultracrete SCJ. This will prevent the ingress of water into the reinstatement and promote a good bond. Ensure all vertical substrates are fully covered.
- Clean any mixing equipment with water immediately after use.
Delivery & Returns Info
Our delivery charges are calculated based on the size and weight of your order. When you add items to your basket, the delivery charges are displayed. Small orders are distributed via courier; larger orders via Pallet Network. Collection is available from our Tamworth depot by request (contact us first to arrange on 0330 122 1025).
Please note, there is a slight surcharge for areas that are outside of our locality, charges calculated at checkout.
| Weight and size | Next Working Day* Order before 1PM (excl. VAT) |
Standard 3-5 Working Day (excl. VAT) |
|---|---|---|
| 0-13KG (1 small bag/tub) |
£14.00 | £9.00 |
| 13.01-25KG (1 large bag/tub) |
£16.00 | £10.00 |
| 25.01-50KG (2 bags/tubs) |
£26.00 | £19.00 |
| 50.01-75KG (3 bags/tubs) |
£36.00 | £28.00 |
| 75.01-100KG (4-5 bags/tubs) |
£46.00 | £37.00 |
| 100.01-249KG (6-9 bags/tubs) |
£60.00 | £45.00 |
| 249.01-750KG (10 bags plus) |
£68.00 | £48.00 |
| 750.01KG plus (30 bags plus) |
£75.00 | £55.00 |
| Full Pallets (56 bags/52 tubs) |
£88.00 | Free of charge |
| Next Working Day delivery (Premium 1-2 Working Day Service) | +avg. £5-10 Extra. Click here for prices |
|---|---|
| Scotland Delivery Service (Deliveries into some parts of Scotland can take 8-10 working days) | Click here for prices |
| Local Delivery & Click & Collect: | Email: orders@thepavingexperts.co.uk |
Delivery Information
- Prices apply to mainland England and Wales. Scottish delivery slight surcharge.
- Orders are packed and dispatched Monday–Friday (excluding weekends & public holidays).
Next Working Day Delivery
- Order before 1PM → same-day dispatch.
- Order after 1PM or on weekends/bank holidays → next working day dispatch.
- You'll receive tracking updates via email/SMS if you provide your details.
Delivery Examples
- Mon before 1PM → Packed Mon, delivered Tue.
- Mon after 1PM → Packed Tues delivered Wed.
- Fri before 1PM → Packed Fri, delivered Mon.
- Fri after 1PM/weekend → Packed Mon, delivered Tues (or Wed after a bank holiday).
- Standard Service: 3–5 working days.
Notes
- Occasional delays due to manufacturing, supply, or courier issues may happen, but we'll keep you informed.
Returns, cancel up to 14 days from date of delivery. Product to be returned in the same condition & packaging. No returns for cementitious & perishable products. You are responsible for the cost of returning goods to The Paving Experts, 20% admin restock fee applies. Need further info, click here.
For further detailed delivery information click here →
UltraCrete QC10 F: Rapid Set Flowable Concrete
UltraCrete QC10 F is one of the best rapid set flowable concretes on the market — an excellent example of a fibre-modified rapid setting concrete that genuinely delivers where it counts. It's a product our customers consistently come back to tell us they're delighted with: pours into place around complex ironwork, compensates for shrinkage, and has carried a HAPAS approval since 2005.
Sets in 10–20 minutes. Workability: 5–10 minutes. Open to traffic in 90 minutes. 20N/mm² compressive strength after 90 minutes. Suitable for applications from 30mm to 500mm in a single pass — QC10 F is a professional-strength rapid set concrete specifically formulated as a flowable backfill concrete for manhole frames and gullies, and equally capable as a rapid set concrete for surface repairs, gate posts and heavy-duty post installation.
We're a small, family-run business — I'm Cleo, the owner, with over 25 years in the construction industry working with businesses including Tarmac and Instarmac. I work alongside a team of incredibly knowledgeable and caring individuals, and between us we've seen a lot of rapid set concretes come and go.
For manhole backfill concrete, gully reinstatement, ironwork backfill, rapid set concrete for surface repairs and trench repairs, and flowable concrete for gate posts and heavy-duty post installation, QC10 F is our go-to recommendation. Its flowable consistency means it self-levels around ironwork and post bases without the need for heavy compaction — making it faster to place and more reliable in confined excavations. For thick-section repairs and haunching where a stiffer mix is preferred, see QC10.
Who Uses UltraCrete QC10 F?
Highways Contractors & Local Authorities
QC10 F is a go-to rapid set backfill concrete for highways contractors and local authority works teams backfilling around manhole frames, gully pots and access covers. HAPAS approved since 2005 and part of the UltraCrete Accredited Reinstatement Specification (UCARS), it provides the specification confidence required for compliant reinstatement on public highway. Open to traffic in 90 minutes — critical for busy road and footway reinstatements.
Utilities & Telecoms Subcontractors
Gas, water, electricity and telecommunications contractors use QC10 F as their rapid concrete for ironwork reinstatement and manhole frame backfill following utility works. Its flowable nature makes it particularly well suited to backfilling around complex frame geometries and trench reinstatements where a stiffer mix would be difficult to place. Open to traffic in 90 minutes — essential when working to tight reinstatement windows on busy roads and footways.
Facilities & Maintenance Contractors
Maintenance contractors working across retail parks, supermarkets, logistics sites and industrial estates use QC10 F for gully and manhole frame backfill and rapid set concrete for surface repairs where speed and minimal disruption are critical. Mixes with water only on site and is open to traffic in 90 minutes.
Specialist Installation & Groundworks Contractors
QC10 F is used by specialist groundworks and installation contractors who need a fast setting concrete for backfilling around frames, ducts and post bases following excavation through existing driveways, roads and paved surfaces. This includes:
- Electric gate and access-control installers — rapid set flowable concrete for post and frame foundations where a self-levelling concrete speeds up installation and reduces compaction effort.
- EV charging contractors — flowable backfill concrete for cable duct routes and charging point bases across car parks and driveways.
- Street lighting and electrical contractors — rapid set backfill concrete for column bases and ducts in roads and footways.
- Drainage and water contractors — flowable backfill concrete for gully pots, drainage frames and connections requiring a rapid set concrete for trench repairs.
- Barrier, bollard and security installers — fast setting concrete for barrier posts and bollard bases where a flowable mix aids placement around foundation steelwork.
Homeowners & Private Road Users
QC10 F can also be used for surface repairs on driveways, shared access roads and private estate roads. Note: patching and surface repairs require use of Ultrascape Pro Prime Slurry Primer prior to application. If you’re unsure whether QC10 F is right for your application, contact us or call 0330 122 1025 — we’re always happy to help.
QC10 F for Electric Gate Installers
If you install electric gates and automated access systems, QC10 F is worth knowing about. Electric gate installation often requires excavating through existing driveways, access roads, car parks and paved surfaces to install power cables, control wiring, ducts and drainage — followed by reinstating the surface and setting gate posts into concrete foundations.
QC10 F is specifically suited to this type of work because:
- It's flowable — pours easily around gate post bases and into confined excavations without needing tamping or compaction, reducing installation time and effort
- It sets in 10–20 minutes — so you’re not waiting around on site before moving to the next stage of the installation
- It reaches 20N/mm² compressive strength in 90 minutes — strong enough to commission and test gate movement significantly sooner than conventional concrete
- It’s suitable from 30mm to 500mm depth in one pass — covering the range of post foundation depths typically encountered in gate installation
- Instarmac confirms QC10 F is suitable for heavy-duty post installation — giving you manufacturer-backed confidence for specifying it on gate post jobs
QC10 F for Gate Posts, Fence Posts and Heavy-Duty Post Installation
Beyond electric gate installers, QC10 F is a strong choice as a rapid set concrete for fence posts, barrier posts and any heavy-duty post installation where speed and flowability matter. Instarmac identifies QC10 F as suitable for heavy-duty post installation, making it equally relevant for:
- Rapid set concrete for fence posts and barrier posts
- Concrete for heavy-duty posts where rapid strength gain is required
- Fast setting concrete for bollard and sign post installation
- Flowable concrete for posts where a poured rather than tamped mix is preferred
Sets in 10–20 minutes. Open to traffic and operational in 90 minutes. Suitable from 30mm to 500mm depth in one pass.
Features & Benefits
- HAPAS approved since 2005
- 20N/mm² compressive strength in 90 minutes
- Sets in 10–20 minutes — one of the fastest setting concretes available
- Open to traffic in 90 minutes
- Workability: 5–10 minutes
- Shrinkage compensated
- Fibre modified for enhanced tensile and flexural performance
- Flowable consistency — self-levels around complex ironwork and post bases
- Simply add water on site to form a high-strength concrete
- Suitable for applications from 30mm – 500mm in one pass
- Approved for use on the London Underground and Overground
- NBS Source registered for ease of specification
- UltraCrete Accredited Reinstatement Specification (UCARS) product
- 56 units per pallet
Applications
QC10 F rapid set flowable concrete is ideal for:
- Manhole backfill concrete and access cover reinstatement
- Concrete for manhole frames and gully reinstatement
- Ironwork backfill concrete and rapid concrete for ironwork reinstatement
- Rapid set concrete for surface repairs (with Pro Prime Slurry Primer)
- Rapid set concrete for trench repairs and utility reinstatement
- Rapid set concrete for haunching reinstatement
- Flowable backfill concrete from 30mm to 500mm in one pass
- Rapid set concrete for electric gate posts and access-control post bases
- Rapid set concrete for gate posts, fence posts and barrier posts
- Fast setting concrete for heavy-duty post installation
- Highway reinstatement requiring open-to-traffic in 90 minutes
UltraCrete Approved Manhole Reinstatement System
QC10 F is part of the UltraCrete Approved Manhole Reinstatement System — a complete range of HAPAS-approved products for roads, footways and carriageways. The full system includes:
| Product | Use |
|---|---|
| UltraCrete M45 | Rapid strength bedding mortar |
| UltraCrete M60 | Rapid strength bedding mortar |
| UltraCrete M60 F | Fibre-reinforced bedding mortar |
| UltraCrete M90 | High strength bedding mortar |
| UltraCrete QC10 | Rapid strength concrete |
| UltraCrete QC10 F | Rapid set flowable concrete (this product) |
| UltraCrete SCJ Seal & Tack Coat | Seal & tack coat for reinstatement edges |
| UltraCrete IRR 6mm | Instant road repair — 6mm aggregate |
| UltraCrete IRR 10mm | Instant road repair — 10mm aggregate |
| UltraCrete Tough Patch Rapid | Rapid surface repair |
| UltraCrete Enviro Mastic | Joint sealant |
| Instaband ECO | Thermoplastic overbanding tape |
QC10 F vs QC10 — Which Do I Need?
| QC10 F | QC10 | |
|---|---|---|
| Type | Flowable, fibre-modified | Standard rapid strength |
| Primary use | Manhole frame & gully backfill, surface repairs, gate/fence posts | Thick-section repairs, haunching, post/sign installation |
| Depth range | 30–500mm | 30–250mm |
| Open to traffic | 90 minutes | 2 hours |
| Consistency | Flowable — pours into place | Workable — tamped or floated |
| Fibre modified | Yes | No |
Frequently Asked Questions about UltraCrete QC10 F
I'm Cleo, owner of The Paving Experts, with over 25 years in the construction industry working with businesses including Tarmac and Instarmac. I work alongside a small team of incredibly knowledgeable and caring individuals who share the same passion for getting it right. The FAQ answers below come from the questions we're asked every single day.
What is QC10 F?
UltraCrete QC10 F is a rapid-set, flowable, fibre-modified concrete designed for backfilling around manhole frames and gullies, as well as surface repairs. Its flowable consistency makes it quick and straightforward to pour into place.
How quickly does QC10 F set?
QC10 F has a set time of approximately 10–20 minutes, with a working time of around 5–10 minutes. Temperature can affect setting times, so contractors should always follow the current technical guidance.
How long before QC10 F can be trafficked?
QC10 F can be opened to traffic after approximately 90 minutes, making it useful for time-critical highway and reinstatement work where minimising disruption is important.
What is QC10 F used for?
QC10 F is used for manhole and ironwork backfilling, surface repairs, trench repairs and other applications where a rapid-setting concrete is required. It is also suitable for heavy-duty post installation, including electric gate posts, fence posts and barrier posts.
Can QC10 F be used for electric gate posts?
Yes. QC10 F is suitable for heavy-duty post installation, making it a practical choice for electric gate installers. Its flowable consistency makes it easy to pour around gate post bases without tamping, while its rapid strength gain — 20N/mm² in 90 minutes — allows contractors to commission and test gate movement significantly sooner than conventional concrete would allow. Instarmac confirms QC10 F is suitable for heavy-duty post installation.
How strong is QC10 F after 90 minutes?
QC10 F achieves a compressive strength of 20N/mm² after 90 minutes, providing rapid strength gain for repairs and reinstatement work.
Is QC10 F a flowable concrete?
Yes. QC10 F is specifically formulated as a flowable rapid-set concrete. It can be poured into position, making it useful for backfilling around manhole frames, gullies, posts and other areas where access can be difficult.
What depth can QC10 F be applied?
QC10 F can be applied at depths from 30mm to 500mm in one pass, making it suitable for a range of deeper repair and backfilling applications.
Can QC10 F be used for manhole reinstatement?
Yes. QC10 F is designed for backfilling around manhole frames and gullies and forms part of UltraCrete's range of manhole reinstatement materials.
Can QC10 F be used for ironwork reinstatement?
Yes. QC10 F can be used for backfilling around highway ironwork, including manhole frames and gullies. Its rapid setting and early strength make it particularly useful where repairs need to be completed quickly.
Can QC10 F be used for trench repairs?
Yes. QC10 F can be used for suitable trench and surface repair applications where a rapid-setting, flowable concrete is required. The application should be assessed against the specific site conditions and product guidance.
Can QC10 F be used for haunching?
QC10 F can be used for suitable haunching and reinstatement applications. Its flowable consistency allows it to be poured into position, while its rapid strength gain helps reduce downtime.
Can QC10 F be used for gate posts and fence posts?
Yes. QC10 F is suitable for heavy-duty post installation, making it a useful option for contractors installing gate posts, fence posts, barriers, signs and similar structures where rapid strength gain is important.
Is QC10 F suitable for electric gate installations?
QC10 F can be a practical choice for electric gate installers, particularly when installing heavy-duty gate posts and needing a rapid-setting concrete. Its flowable consistency makes it easy to pour around posts, while its rapid strength gain helps contractors move on with the installation sooner.
What is the difference between QC10 and QC10 F?
Both are rapid-setting UltraCrete concretes, but QC10 F is the flowable, fibre-modified version. QC10 F is designed for applications including backfilling around manhole frames and gullies, while QC10 is a rapid-strength concrete used for thick-section repairs, haunching, ironwork backfilling and post, sign, fence and barrier installation.
How long is the working time for QC10 F?
QC10 F has a working time of approximately 5–10 minutes. Because it sets quickly, contractors should have everything prepared before mixing and work promptly once the material has been mixed.
How do you mix QC10 F?
QC10 F can be mixed by hand or mechanically. Water is added on site to produce a smooth, flowable consistency. It is important not to over-water the product, as excessive water can slow strength gain and reduce final compressive strength.
Can QC10 F be used in cold weather?
QC10 F should ideally be used between 0°C and 30°C. For temperatures outside this range, contractors should contact Instarmac for advice and follow the latest technical guidance.
Is QC10 F shrinkage compensated?
Yes. QC10 F is a shrinkage-compensated concrete, helping it maintain performance during the curing process when correctly mixed and applied.
What size bag does QC10 F come in?
QC10 F is supplied in a 25kg plastic bag, making it practical for contractors carrying out repairs and reinstatement work on site.
Is QC10 F suitable for time-critical repairs?
Yes. Its combination of a 10–20 minute set time, 20N/mm² strength after 90 minutes and 90-minute trafficability makes QC10 F particularly suitable for time-critical repairs where keeping disruption to a minimum is important.
Why use QC10 F instead of conventional concrete?
The main advantage of QC10 F is speed. Conventional concrete can require a much longer curing period before it can be trafficked or loaded. QC10 F achieves 20N/mm² compressive strength in 90 minutes and can be opened to traffic at that point — making it significantly faster for highway, reinstatement and installation work where downtime needs to be minimised.
For technical support, specification help, or bulk pricing, contact our team or call 0330 122 1025 — we’re a small, family-run business and always happy to help.
Technical information
- Workability: 5 – 10 minutes
- Set time: 10 – 20 minutes
- Depth: 30mm – 500mm
- Density: 2300kg/m³
- Yield: approximately 12 litres per 25kg bag
- Colour: grey (colour variation may occur as with all raw materials; this does not affect consistency or product characteristics)
- Size: 25kg plastic bag (56 units per pallet)
- Temperature: do not use below 0°C or above 30°C without seeking advice
- Cleaning: remove from tools and equipment with clean water immediately after use. Cured material can be removed mechanically.
Compressive strength (N/mm²)
| Time | Strength |
|---|---|
| 90 minutes | 20.00 |
| 1 day | 35.00 |
| 7 days | 50.00 |
| 28 days | 60.00 |
Tensile strength (N/mm²)
| Time | Strength |
|---|---|
| 1 day | 1.50 |
| 7 days | 2.50 |
| 28 days | 3.00 |
Flexural strength (N/mm²)
| Time | Strength |
|---|---|
| 1 day | 4.50 |
| 7 days | 5.00 |
| 28 days | 6.00 |
Delivery & Returns Info
Our delivery charges are calculated based on the size and weight of your order. When you add items to your basket, the delivery charges are displayed. Small orders are distributed via courier; larger orders via Pallet Network. Collection is available from our Tamworth depot by request (contact us first to arrange on 0330 122 1025).
Please note, there is a slight surcharge for areas that are outside of our locality, charges calculated at checkout.
| Weight and size | Next Working Day* Order before 1PM (excl. VAT) |
Standard 3-5 Working Day (excl. VAT) |
|---|---|---|
| 0-13KG (1 small bag/tub) |
£14.00 | £9.00 |
| 13.01-25KG (1 large bag/tub) |
£16.00 | £10.00 |
| 25.01-50KG (2 bags/tubs) |
£26.00 | £19.00 |
| 50.01-75KG (3 bags/tubs) |
£36.00 | £28.00 |
| 75.01-100KG (4-5 bags/tubs) |
£46.00 | £37.00 |
| 100.01-249KG (6-9 bags/tubs) |
£60.00 | £45.00 |
| 249.01-750KG (10 bags plus) |
£68.00 | £48.00 |
| 750.01KG plus (30 bags plus) |
£75.00 | £55.00 |
| Full Pallets (56 bags/52 tubs) |
£88.00 | Free of charge |
| Next Working Day delivery (Premium 1-2 Working Day Service) | +avg. £5-10 Extra. Click here for prices |
|---|---|
| Scotland Delivery Service (Deliveries into some parts of Scotland can take 8-10 working days) | Click here for prices |
| Local Delivery & Click & Collect: | Email: orders@thepavingexperts.co.uk |
Delivery Information
- Prices apply to mainland England and Wales. Scottish delivery slight surcharge.
- Orders are packed and dispatched Monday–Friday (excluding weekends & public holidays).
Next Working Day Delivery
- Order before 1PM → same-day dispatch.
- Order after 1PM or on weekends/bank holidays → next working day dispatch.
- You'll receive tracking updates via email/SMS if you provide your details.
Delivery Examples
- Mon before 1PM → Packed Mon, delivered Tue.
- Mon after 1PM → Packed Tues delivered Wed.
- Fri before 1PM → Packed Fri, delivered Mon.
- Fri after 1PM/weekend → Packed Mon, delivered Tues (or Wed after a bank holiday).
- Standard Service: 3–5 working days.
Notes
- Occasional delays due to manufacturing, supply, or courier issues may happen, but we'll keep you informed.
Returns, cancel up to 14 days from date of delivery. Product to be returned in the same condition & packaging. No returns for cementitious & perishable products. You are responsible for the cost of returning goods to The Paving Experts, 20% admin restock fee applies. Need further info, click here.
For further detailed delivery information click here →
How to prepare surfaces for QC10 F
All surfaces should be free from oil, grease, dust or any other visible contaminants.- Remove all loose particles and work on a sound substrate.
- Pre-soak the area with clean water prior to application to aid bond.
- Remove ponded water before applying the product. Good concrete practice should always be observed to enable the mix to be placed into position within 4 minutes.
How to mix QC10 F Rapid Set Flowable Concrete
- Can be mixed mechanically or by hand.
- If by hand, ensure that the mixing is vigorous.
- Mix the inner bag containing the cement with the sand/aggregate.
- Formulated to be mixed to a smooth flowable consistency.
- It is advisable to add a maximum of 2 litres of water initially, mix and if required, add up to a further 0.25 litres.
- It is essential that this product not be over-watered. The addition of excessive water will result in slower strength gain, reduced final compressive strength and the possibility of shrinkage cracking.
- Sand/aggregate contains moisture and the volume of water required will vary depending on the moisture content of the aggregate.
- Mix only enough material to apply within 4 minutes.
- Never remix or add water.
- If the product needs to be applied to walls then the water content can be reduced to obtain a stiffer consistency.
How to apply QC10 F Rapid Set Flowable Concrete
- Pour mixed QC10 F into place (if required lightly trowel to ensure good contact with edges), 60mm below the required surface.
- Once the material has reached an initial set, all horizontal surfaces of the reinstatement, including the ironwork, should be sprayed with Ultracrete SCJ. This will prevent the ingress of water into the reinstatement and promote a good bond. Ensure all vertical substrates are fully covered.
- Clean any mixing equipment with water immediately after use.