UltraScape Flowpoint Smooth Rapid Set External Paving Grout - Natural Grey

UltraScape Flowpoint Smooth Natural Grey is a flowable paving grout specially designed for patios, pathways, driveways, and public realm projects. Ideal for porcelain paving, it fills joints from just 3mm wide and works perfectly with granite setts, sandstone, limestone, Indian stone, Yorkstone, and concrete slabs. With its finer aggregate finish, Flowpoint Smooth is the go-to jointing solution for porcelain paving.

Supplied in a convenient 25kg bag, Flowpoint Smooth is lightweight enough to handle, mixes easily with water, and can be applied quickly with a squeegee. Thanks to its rapid-setting formula, your patio can be pointed far faster than traditional jointing methods — achieving an initial set in just 15-30 minutes. Once washed down, it leaves strong, durable joints that block weeds and resist water ingress.

What is Flowpoint Smooth Paving Grout – Rapid-Setting Grout for Patios & Paved Areas?

UltraScape Flowpoint Smooth is a rapid-setting, flowable paving grout designed to quickly and efficiently point patios, terraces, pathways, and paved areas — even in light rain. Suitable for domestic and commercial paving projects, Flowpoint works with all types of natural and manufactured stone, including sandstone, porcelain, limestone, Indian stone, slate, clay, concrete, and granite setts.

Favoured by major contractors, Flowpoint is an award-winning grout available in multiple grades:

• Standard – general paving

• Smooth – fine-flow finish

• ECO – contains 20% recycled glass

• Fine – ideal for porcelain

Flowpoint Smooth is one of the fastest-setting paving grouts on the market, achieving a dry surface in just 30 minutes. Supplied in 25kg bags (Fine grade in 20kg tubs), it creates seamless, durable joints on smooth or riven paving slabs and can last up to 40 years, making it a trusted choice for long-lasting patios and paved areas.

Why Choose Flowpoint Smooth Natural Grey?

• Fast application & rapid set – walkable sooner than traditional patio grouts

• Durable finish – prevents weed growth and water damage

• BS 7533 compliant – exceeds British Standard requirements for paving grout

• Trusted for 20+ years – used in public realm, streetscape, landscaping & domestic patios

• Long-lasting performance – designed to last up to 40 years

UltraScape Flowpoint Smooth Natural Grey combines speed, strength, and durability, making it one of the best paving grouts for porcelain and natural stone patios.

What Other Types of Flowpoint Paving Grout Are Available?

Flowpoint paving grout is available in 8 specialist grades and 4 colour options, making it suitable for patios, driveways, pavements, terraces, and large commercial paving projects. Each grade is designed to deliver the same rapid-setting, durable performance while offering flexibility for different paving materials and joint widths.

The Flowpoint Paving Grout Range

• Flowpoint Standard – Natural Grey, Charcoal (5–50mm joints | 20–200mm depth)
  
• Flowpoint ECO – Natural Grey, Charcoal (5–50mm joints | 20–200mm depth)
  
• Flowpoint Smooth – Natural Grey, Charcoal (3–50mm joints | 20–200mm depth)
  
• Flowpoint Fine – Natural Grey, Charcoal (2–50mm joints | 20–200mm depth)
  

New Flowpoint Premium Paving Grout Colours (same performance, fresh branding)

• Flowpoint Premium Standard – Stone Grey, Limestone (5–50mm joints | 20–200mm depth)
  
• Flowpoint Premium ECO – Stone Grey, Limestone (5–50mm joints | 20–200mm depth)
  
• Flowpoint Premium Smooth – Stone Grey, Limestone (3–50mm joints | 20–200mm depth)
  
• Porcelpoint (for porcelain paving) – Stone Grey, Limestone (2–50mm joints | 20–200mm depth)
  

With multiple grades and finishes, Flowpoint offers a fast, strong, and versatile paving grout solution for all types of natural stone, concrete, and porcelain paving.

How do I use Flowpoint Smooth?

This handy reel on Facebook will show you how to lay Flowpoint, and give you some handy hints and tips. Click here for a video on how to lay Flowpoint Paving Grout.

What is Flowpoint Smooth used for?

UltraScape Flowpoint Smooth is a fast set flowable, paving grout for grouting patios and paved areas, particularly for porcelain & all types natural stone that need a finer joint, Flowpoint Smooth can accommodate joints from just 3mm. Flowpoint Smooth is ideal for paved areas which are rigid or bound, and where a void-free joint is needed. This rapid set paving grout can be used with all types of natural stone, concrete flags and clay pavers.

Use with the UltraScape BS 7533 Mortar Paving System, a range of high performance materials that meet and exceed the strict demands of BS 7533. Including a rapid strength fine bedding concrete - EcoBed, priming slurry - Pro-Prime and flowable jointing grout Flowpoint.

If you'd like to learn a little more about UltraScape Flowpoint, the grades and colours it is available in and why it's the UK's favourite slurry paving grout, read our recent blog post 'What is Flowpoint' here, or check out our Frequently asked questions here!

How Much Flowpoint Smooth Grout Do I Need for My Patio?

When planning a patio project, knowing how much Flowpoint Smooth paving grout you’ll need is essential. UltraScape Smooth Flowpoint is a rapid set, flowable paving grout designed for patios and all types of paving slabs — including porcelain paving (from 3mm joints), natural stone, concrete slabs, and granite setts.

Easy to mix with water, Flowpoint has an initial set of 15-30 minutes (dept on temp), provides up to 40 years of durability, and meets the vital British Standard - BS 7533. Its non-permeable finish helps prevent weeds, works even in light rain, and ensures a professional, long-lasting patio finish. Available in Natural Grey, Charcoal and new Premium in Stone Grey & Limestone.

Flowpoint Smooth Approximate Coverage Guide (per 25kg bag)

• Porcelain Paving (600×900, 5x20mm joints): ≈ 30m²
• Sandstone Mixed Packs: ≈ 12–20m²
• Granite Setts: ≈ 1.5–2m²
  

👉 For the most accurate calculation, use The Paving Expert’s Flowpoint Calculator on the product page to estimate coverage for your exact paving size and joint width.

Does Flowpoint Paving Grout Cause Staining?

Flowpoint Paving Grout does not cause staining or efflorescence—as long as it’s installed correctly and the manufacturer’s guidelines are followed.
However, staining can occur if key steps are skipped during installation. Most issues are caused by:

• Not using a paving primer (like Ultrascape Pro-Prime)
• Failing to mist the paving slabs with water during installation
• Over-watering the grout mix, or allowing water to pool on slabs or in joints

These mistakes can lead to grout haze, patchy discolouration, or dried grout residue on the surface—difficult to remove once cured.

How to Prevent Flowpoint Grout Stains

Follow these simple tips to keep your patio grout looking clean and professional:

1. Use a quality paving primer
   Apply a cement-based primer such as Ultrascape Pro-Prime to bond slabs to the mortar bed and prevent stains from seeping through.
2. Mist the slabs during application
   Lightly spray the paving with water using a rose nozzle or kitchen sprayer throughout the process. This helps control drying and prevents staining.
3. Avoid excess water
   Do not over-wet the grout mix or allow water to sit on the slabs or joints. Excess water causes surface staining, cracking, and uneven finishes.
4. Use a neoprene squeegee
   Push the grout firmly into the joints and remove as much as possible from the slab surface for a clean, even result.

✅ Conclusion: Flowpoint only stains when misused. By following the correct process, it delivers clean, durable results—no staining, no efflorescence.

What is the Shelf Life for Flowpoint?

Shelf life from date of manufacture printed on the bag, unopened in the above conditions, for sealed bags is 8 months. Please note: the use of this product after the end of the declared storage period may increase the risk of an allergic reaction.

Please note: Flowpoint is generally not recommended for use with some darker limestone, such as black limestone, as it can lead to a slight oxidisation. However if you use a Patio or Paving Primer, then there shouldn't be any issues using Flowpoint with Black Slate or Limestone - click here for our recommended Tile Rite Patio Prep Temporary Sealer. Call our expert team if you would like further advice. ☎️ 0330 122 1025.

Flowpoint Smooth technical information

• Available in Charcoal and Natural Grey
• Ideal for Porcelain, Granite setts, Sandstone, Limestone, Indian Stone, Yorkstone and Concrete Slabs (not suitable for black limestone)
• Can fill joints from 3mm - 50mm wide, with a minimum depth of 20mm, up to 200mm in one application!
• Open to foot traffic in 1 hour
• Open to vehicular traffic in 4 hours
• Rapid setting with exceptional bond strength
• Shrinkage compensated
• Mixes quickly on-site with water in a bucket - one bag at a time
• Initial set after 15 minutes at 20°C
• Please note: Flowpoint is not recommended for use with some darker limestone, such as black limestone, as it can lead to a slight oxidisation. Call our expert team if you would like further advice on the ideal grout for darker limestone.
• Cool temperatures retard, warm temperatures accelerate product performance (be careful to not use in direct sunlight as product will go off rapidly).
• Economical to use
• Mix and use one bag at a time
• Conforms to British Standard - BS 7533
• Ideal for large commercial and domestic projects
• Shelf life from date of manufacture printed on the bag, unopened in the above conditions, for sealed bags is 8 months. Please note: the use of this product after the end of the declared storage period may increase the risk of an allergic reaction.