Nexus ProJoint Contract SBR | Water-Based Paving Bonding Primer

About the product

Nexus ProJoint Contract SBR | Water-Based Paving Bonding Primer

£79.99 ex. VAT £95.99 inc VAT
PRICE PROMISE
Nexus ProJoint Contract SBR
In stock
£79.99
£95.99 inc VAT
PRICE PROMISE
Get Delivery By --
DELIVERY TO MAINLAND UK ONLY

For Highlands, Guernsey, Jersey, Isle of Man, and Isle of Wight – call 0330 122 1025.

£79.99
£95.99 inc VAT
PRICE PROMISE
Get Delivery By --
DELIVERY TO MAINLAND UK ONLY

For Highlands, Guernsey, Jersey, Isle of Man, and Isle of Wight – call 0330 122 1025.

About the product

Nexus ProJoint Contract SBR – Water-Based Paving Bonding Primer

A water-based SBR bonding primer and mortar additive for lighter paving applications.

Nexus ProJoint Contract SBR is a high-quality, water-based emulsion of a modified styrene-butadiene polymer. It is designed to improve the strength and workability of sand-and-cement mortar and can also be used to prime the surface of natural stone or concrete slabs and setts to promote adhesion.

Used as a slurry primer, Contract SBR helps create a stronger bond between paving and bedding mortar. Its non-foaming properties help control mortar density, while the formulation can increase compressive, tensile and flexural strength, improve flexibility and support resistance to freeze/thaw cycles.

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. For smaller or lighter paving work, Contract SBR can be a practical choice. For larger patios and more substantial paving projects, we generally recommend the stronger cement-based UltraScape Pro-Prime Slurry Paving Primer.

When is Contract SBR the right choice?

Contract SBR is suited to lighter paving applications where you want to improve adhesion between suitable paving and a sand-and-cement bedding mortar. It can be used with natural stone, concrete slabs and setts, including patios, paths, smaller driveways and similar paving work.

For larger patios, extensive paving areas or projects where a stronger cement-based slurry primer is preferred, we recommend considering UltraScape Pro-Prime instead. If you are unsure which primer suits the size and construction of your project, contact us before ordering.

Key benefits of Nexus ProJoint Contract SBR

  • Water-based emulsion of a modified styrene-butadiene polymer
  • Improves adhesion between paving slabs or setts and bedding mortar
  • Suitable for natural stone and concrete paving
  • Can be used as a slurry primer and as an additive in sand-and-cement mortar
  • Improves mortar workability, strength and flexibility
  • Non-foaming properties help control mortar density
  • Can increase compressive, tensile and flexural strength
  • Supports freeze/thaw resistance and mortar durability
  • Useful for patios, paths, lighter driveways and smaller paving projects
  • Not suitable for porcelain paving; use ProJoint Porcelain Primer instead

How to use Contract SBR

Contract SBR can be used to prime the underside of suitable natural stone or concrete slabs and setts, or as an additive in a sand-and-cement bedding mortar. Use the product in accordance with the current technical datasheet and the specified mix for the project. We have not added a mixing ratio here because the correct proportion depends on the application and should be checked against the product instructions.

  1. Make sure the paving and bedding surfaces are sound, clean and free from loose contamination.
  2. Use Contract SBR as the slurry primer or mortar additive required for the chosen paving system.
  3. Apply it to the appropriate surface and follow the current datasheet guidance for mixing, coverage and application.
  4. For larger patios and more substantial paving projects, consider the stronger cement-based UltraScape Pro-Prime.

Download the Nexus ProJoint Contract SBR technical datasheet (PDF)

Contract SBR technical information

Property Detail
Product type Water-based modified styrene-butadiene polymer emulsion
Primary use Bonding primer and additive for sand-and-cement mortar
Suitable paving Natural stone and concrete slabs or setts
Application Slurry primer or mortar additive
Foaming Non-foaming properties help control mortar density
Performance benefits Supports increased compressive, tensile and flexural strength, flexibility and workability
Durability Supports freeze/thaw resistance and mortar durability
Porcelain Not suitable; use a dedicated ProJoint Porcelain Primer
Project suitability Useful for lighter paving applications; consider UltraScape Pro-Prime for larger patios and substantial paving projects

Contract SBR FAQs

I’m Cleo, owner of The Paving Experts. These are the questions we’re most often asked about bonding primers and paving preparation.

What is Contract SBR?

Contract SBR is a water-based emulsion of a modified styrene-butadiene polymer. It improves the strength and workability of sand-and-cement mortar and can be used as a primer to promote adhesion between suitable paving and bedding mortar.

What can Contract SBR be used for?

It can be used as a slurry primer beneath suitable natural stone or concrete slabs and setts, and as an additive in sand-and-cement bedding mortar.

Can Contract SBR be used on natural stone?

Yes. It is suitable for priming natural stone slabs and setts and for supporting adhesion to suitable bedding mortar.

Can Contract SBR be used on concrete paving?

Yes. Contract SBR can be used with suitable concrete slabs and setts, subject to the paving system and current product instructions.

Can Contract SBR be used on porcelain?

No. It is not suitable for porcelain products. Use the dedicated ProJoint Porcelain Primer instead.

Is Contract SBR suitable for large patios?

Contract SBR can be useful for lighter paving applications, but for larger patios and more substantial paving projects we generally recommend the stronger cement-based UltraScape Pro-Prime Slurry Paving Primer.

What is the difference between Contract SBR and UltraScape Pro-Prime?

Both are used to support adhesion in paving systems, but Contract SBR is a water-based polymer emulsion suited to lighter applications. UltraScape Pro-Prime is a stronger cement-based slurry primer that we generally prefer for larger patios and more substantial paving projects.

Does Contract SBR improve mortar strength?

Its non-foaming formulation helps control mortar density and can result in increased compressive, tensile and flexural strength, alongside improved workability and flexibility.

Does Contract SBR help with freeze/thaw resistance?

Contract SBR provides additional benefits including excellent freeze/thaw resistance and mortar durability when used as part of a suitable paving system.

Is a mixing ratio included here?

We have not added a universal ratio because the correct mix depends on the application and paving system. Always follow the current Contract SBR technical datasheet and project specification.

Can you help me choose the right primer?

Absolutely. Tell us what you are paving, the approximate size of the project, the paving material and whether it is a smaller or larger installation. We’ll help you compare Contract SBR, UltraScape Pro-Prime and the ProJoint Porcelain Primer.

Need help specifying a paving primer? Contact our family-run team before ordering.

  • Brand: Nexus
  • Product Type: Paving Bonding Primer
  • SKU: TPE-CSBSBRCON7A8
  • Weight: 5.0 kg / 11.02 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.

Nexus ProJoint Contract SBR – Water-Based Paving Bonding Primer

A water-based SBR bonding primer and mortar additive for lighter paving applications.

Nexus ProJoint Contract SBR is a high-quality, water-based emulsion of a modified styrene-butadiene polymer. It is designed to improve the strength and workability of sand-and-cement mortar and can also be used to prime the surface of natural stone or concrete slabs and setts to promote adhesion.

Used as a slurry primer, Contract SBR helps create a stronger bond between paving and bedding mortar. Its non-foaming properties help control mortar density, while the formulation can increase compressive, tensile and flexural strength, improve flexibility and support resistance to freeze/thaw cycles.

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. For smaller or lighter paving work, Contract SBR can be a practical choice. For larger patios and more substantial paving projects, we generally recommend the stronger cement-based UltraScape Pro-Prime Slurry Paving Primer.

When is Contract SBR the right choice?

Contract SBR is suited to lighter paving applications where you want to improve adhesion between suitable paving and a sand-and-cement bedding mortar. It can be used with natural stone, concrete slabs and setts, including patios, paths, smaller driveways and similar paving work.

For larger patios, extensive paving areas or projects where a stronger cement-based slurry primer is preferred, we recommend considering UltraScape Pro-Prime instead. If you are unsure which primer suits the size and construction of your project, contact us before ordering.

Key benefits of Nexus ProJoint Contract SBR

  • Water-based emulsion of a modified styrene-butadiene polymer
  • Improves adhesion between paving slabs or setts and bedding mortar
  • Suitable for natural stone and concrete paving
  • Can be used as a slurry primer and as an additive in sand-and-cement mortar
  • Improves mortar workability, strength and flexibility
  • Non-foaming properties help control mortar density
  • Can increase compressive, tensile and flexural strength
  • Supports freeze/thaw resistance and mortar durability
  • Useful for patios, paths, lighter driveways and smaller paving projects
  • Not suitable for porcelain paving; use ProJoint Porcelain Primer instead

How to use Contract SBR

Contract SBR can be used to prime the underside of suitable natural stone or concrete slabs and setts, or as an additive in a sand-and-cement bedding mortar. Use the product in accordance with the current technical datasheet and the specified mix for the project. We have not added a mixing ratio here because the correct proportion depends on the application and should be checked against the product instructions.

  1. Make sure the paving and bedding surfaces are sound, clean and free from loose contamination.
  2. Use Contract SBR as the slurry primer or mortar additive required for the chosen paving system.
  3. Apply it to the appropriate surface and follow the current datasheet guidance for mixing, coverage and application.
  4. For larger patios and more substantial paving projects, consider the stronger cement-based UltraScape Pro-Prime.

Download the Nexus ProJoint Contract SBR technical datasheet (PDF)

Contract SBR technical information

Property Detail
Product type Water-based modified styrene-butadiene polymer emulsion
Primary use Bonding primer and additive for sand-and-cement mortar
Suitable paving Natural stone and concrete slabs or setts
Application Slurry primer or mortar additive
Foaming Non-foaming properties help control mortar density
Performance benefits Supports increased compressive, tensile and flexural strength, flexibility and workability
Durability Supports freeze/thaw resistance and mortar durability
Porcelain Not suitable; use a dedicated ProJoint Porcelain Primer
Project suitability Useful for lighter paving applications; consider UltraScape Pro-Prime for larger patios and substantial paving projects

Contract SBR FAQs

I’m Cleo, owner of The Paving Experts. These are the questions we’re most often asked about bonding primers and paving preparation.

What is Contract SBR?

Contract SBR is a water-based emulsion of a modified styrene-butadiene polymer. It improves the strength and workability of sand-and-cement mortar and can be used as a primer to promote adhesion between suitable paving and bedding mortar.

What can Contract SBR be used for?

It can be used as a slurry primer beneath suitable natural stone or concrete slabs and setts, and as an additive in sand-and-cement bedding mortar.

Can Contract SBR be used on natural stone?

Yes. It is suitable for priming natural stone slabs and setts and for supporting adhesion to suitable bedding mortar.

Can Contract SBR be used on concrete paving?

Yes. Contract SBR can be used with suitable concrete slabs and setts, subject to the paving system and current product instructions.

Can Contract SBR be used on porcelain?

No. It is not suitable for porcelain products. Use the dedicated ProJoint Porcelain Primer instead.

Is Contract SBR suitable for large patios?

Contract SBR can be useful for lighter paving applications, but for larger patios and more substantial paving projects we generally recommend the stronger cement-based UltraScape Pro-Prime Slurry Paving Primer.

What is the difference between Contract SBR and UltraScape Pro-Prime?

Both are used to support adhesion in paving systems, but Contract SBR is a water-based polymer emulsion suited to lighter applications. UltraScape Pro-Prime is a stronger cement-based slurry primer that we generally prefer for larger patios and more substantial paving projects.

Does Contract SBR improve mortar strength?

Its non-foaming formulation helps control mortar density and can result in increased compressive, tensile and flexural strength, alongside improved workability and flexibility.

Does Contract SBR help with freeze/thaw resistance?

Contract SBR provides additional benefits including excellent freeze/thaw resistance and mortar durability when used as part of a suitable paving system.

Is a mixing ratio included here?

We have not added a universal ratio because the correct mix depends on the application and paving system. Always follow the current Contract SBR technical datasheet and project specification.

Can you help me choose the right primer?

Absolutely. Tell us what you are paving, the approximate size of the project, the paving material and whether it is a smaller or larger installation. We’ll help you compare Contract SBR, UltraScape Pro-Prime and the ProJoint Porcelain Primer.

Need help specifying a paving primer? Contact our family-run team before ordering.

Nexus ProJoint Contract SBR – Water-Based Paving Bonding Primer

A water-based SBR bonding primer and mortar additive for lighter paving applications.

Nexus ProJoint Contract SBR is a high-quality, water-based emulsion of a modified styrene-butadiene polymer. It is designed to improve the strength and workability of sand-and-cement mortar and can also be used to prime the surface of natural stone or concrete slabs and setts to promote adhesion.

Used as a slurry primer, Contract SBR helps create a stronger bond between paving and bedding mortar. Its non-foaming properties help control mortar density, while the formulation can increase compressive, tensile and flexural strength, improve flexibility and support resistance to freeze/thaw cycles.

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. For smaller or lighter paving work, Contract SBR can be a practical choice. For larger patios and more substantial paving projects, we generally recommend the stronger cement-based UltraScape Pro-Prime Slurry Paving Primer.

When is Contract SBR the right choice?

Contract SBR is suited to lighter paving applications where you want to improve adhesion between suitable paving and a sand-and-cement bedding mortar. It can be used with natural stone, concrete slabs and setts, including patios, paths, smaller driveways and similar paving work.

For larger patios, extensive paving areas or projects where a stronger cement-based slurry primer is preferred, we recommend considering UltraScape Pro-Prime instead. If you are unsure which primer suits the size and construction of your project, contact us before ordering.

Key benefits of Nexus ProJoint Contract SBR

  • Water-based emulsion of a modified styrene-butadiene polymer
  • Improves adhesion between paving slabs or setts and bedding mortar
  • Suitable for natural stone and concrete paving
  • Can be used as a slurry primer and as an additive in sand-and-cement mortar
  • Improves mortar workability, strength and flexibility
  • Non-foaming properties help control mortar density
  • Can increase compressive, tensile and flexural strength
  • Supports freeze/thaw resistance and mortar durability
  • Useful for patios, paths, lighter driveways and smaller paving projects
  • Not suitable for porcelain paving; use ProJoint Porcelain Primer instead

How to use Contract SBR

Contract SBR can be used to prime the underside of suitable natural stone or concrete slabs and setts, or as an additive in a sand-and-cement bedding mortar. Use the product in accordance with the current technical datasheet and the specified mix for the project. We have not added a mixing ratio here because the correct proportion depends on the application and should be checked against the product instructions.

  1. Make sure the paving and bedding surfaces are sound, clean and free from loose contamination.
  2. Use Contract SBR as the slurry primer or mortar additive required for the chosen paving system.
  3. Apply it to the appropriate surface and follow the current datasheet guidance for mixing, coverage and application.
  4. For larger patios and more substantial paving projects, consider the stronger cement-based UltraScape Pro-Prime.

Download the Nexus ProJoint Contract SBR technical datasheet (PDF)

Contract SBR technical information

Property Detail
Product type Water-based modified styrene-butadiene polymer emulsion
Primary use Bonding primer and additive for sand-and-cement mortar
Suitable paving Natural stone and concrete slabs or setts
Application Slurry primer or mortar additive
Foaming Non-foaming properties help control mortar density
Performance benefits Supports increased compressive, tensile and flexural strength, flexibility and workability
Durability Supports freeze/thaw resistance and mortar durability
Porcelain Not suitable; use a dedicated ProJoint Porcelain Primer
Project suitability Useful for lighter paving applications; consider UltraScape Pro-Prime for larger patios and substantial paving projects

Contract SBR FAQs

I’m Cleo, owner of The Paving Experts. These are the questions we’re most often asked about bonding primers and paving preparation.

What is Contract SBR?

Contract SBR is a water-based emulsion of a modified styrene-butadiene polymer. It improves the strength and workability of sand-and-cement mortar and can be used as a primer to promote adhesion between suitable paving and bedding mortar.

What can Contract SBR be used for?

It can be used as a slurry primer beneath suitable natural stone or concrete slabs and setts, and as an additive in sand-and-cement bedding mortar.

Can Contract SBR be used on natural stone?

Yes. It is suitable for priming natural stone slabs and setts and for supporting adhesion to suitable bedding mortar.

Can Contract SBR be used on concrete paving?

Yes. Contract SBR can be used with suitable concrete slabs and setts, subject to the paving system and current product instructions.

Can Contract SBR be used on porcelain?

No. It is not suitable for porcelain products. Use the dedicated ProJoint Porcelain Primer instead.

Is Contract SBR suitable for large patios?

Contract SBR can be useful for lighter paving applications, but for larger patios and more substantial paving projects we generally recommend the stronger cement-based UltraScape Pro-Prime Slurry Paving Primer.

What is the difference between Contract SBR and UltraScape Pro-Prime?

Both are used to support adhesion in paving systems, but Contract SBR is a water-based polymer emulsion suited to lighter applications. UltraScape Pro-Prime is a stronger cement-based slurry primer that we generally prefer for larger patios and more substantial paving projects.

Does Contract SBR improve mortar strength?

Its non-foaming formulation helps control mortar density and can result in increased compressive, tensile and flexural strength, alongside improved workability and flexibility.

Does Contract SBR help with freeze/thaw resistance?

Contract SBR provides additional benefits including excellent freeze/thaw resistance and mortar durability when used as part of a suitable paving system.

Is a mixing ratio included here?

We have not added a universal ratio because the correct mix depends on the application and paving system. Always follow the current Contract SBR technical datasheet and project specification.

Can you help me choose the right primer?

Absolutely. Tell us what you are paving, the approximate size of the project, the paving material and whether it is a smaller or larger installation. We’ll help you compare Contract SBR, UltraScape Pro-Prime and the ProJoint Porcelain Primer.

Need help specifying a paving primer? Contact our family-run team before ordering.

Contract SBR technical information

PropertyDetail
FormulationWater-based modified styrene-butadiene polymer emulsion
UsesSlurry primer and additive for sand-and-cement mortar
Suitable pavingNatural stone and concrete slabs or setts
PropertiesNon-foaming; supports mortar density control, workability, flexibility and strength
PerformanceSupports increased compressive, tensile and flexural strength, freeze/thaw resistance and mortar durability
PorcelainNot suitable; use ProJoint Porcelain Primer
Project guidanceUseful for lighter applications; consider UltraScape Pro-Prime for larger patios and substantial paving projects

Download the Contract SBR technical datasheet (PDF)

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 use Contract SBR

Contract SBR can be used as a slurry primer beneath suitable natural stone or concrete slabs and setts, or as an additive in sand-and-cement bedding mortar.

  1. Make sure the paving and bedding surfaces are sound, clean and free from loose contamination.
  2. Use Contract SBR for the chosen primer or mortar-additive application.
  3. Follow the current technical datasheet for the correct mix, coverage and application instructions. We have not added a universal ratio because this depends on the project.
  4. For larger patios and substantial paving projects, consider the stronger cement-based UltraScape Pro-Prime.

Not suitable for porcelain. Use ProJoint Porcelain Primer instead.

Nexus ProJoint Contract SBR is a water‑based emulsion of a modified styrene‑butadiene polymer designed to improve the performance of sand and cement mortar used in paving installations. It strengthens the mortar and can also act as a primer for paving surfaces.