SBR (Styrene Butadiene Rubber) admixture — add to screed, mortar or repair work to dramatically improve strength, flexibility, waterproofing and adhesion.
What Makes SBR
Stand Out
SBR (Styrene Butadiene Rubber) admixture — add to screed, mortar or repair work to dramatically improve strength, flexibility, waterproofing and adhesion.
Boosts compressive and tensile strength of screed and mortar mixes by up to 40% for more durable installations.
SBR polymer forms a waterproof matrix within cured mortar — significantly reduces water absorption and dampness.
Adds flexibility and crack-resistance to rigid cement mortars — absorbs movement and prevents brittle failure.
Significantly improves bond between new and existing concrete — ideal for repair and overlay applications.
Mix with Zeorich Base and Basalt for enhanced screed — higher strength, lower cracking, better waterproofing.
Use in repair mortars for concrete and masonry — achieves superior bond to existing substrate vs plain mortar.
Compatible with all Portland cement mixes, Zeorich products and standard construction mortars.
Liquid admixture — simply replace part of mix water with Zeorich SBR. No special equipment required.
Technologies
Reduces water absorption in mortars — prevents dampness penetration
Up to 40% improvement in bond and compressive strength
Adds crack resistance and movement tolerance to rigid mortars
Improves adhesion of new mortar to existing substrates
Where SBR Performs
Add to Zeorich Base + Basalt mix for enhanced system performance
SBR-modified mortar beds and renders for pool construction
Repair mortars for concrete structures — better bond to existing
Waterproofing renders for basements and retaining walls
Basement tanking and damp-proofing mortars
Apply neat to substrate as bonding agent before new mortar
How to Use SBR
- Add Zeorich SBR at 10–20% by volume of mixing water
- Mix with Zeorich Base and Basalt as normal
- Enhanced: lower shrinkage, better waterproofing, higher bond strength
- Do not exceed recommended dosage — excessive SBR reduces setting
- Replace 50% of mixing water with Zeorich SBR
- Mix with cement and sand to normal consistency
- Apply to properly prepared substrate — clean, saturated surface dry
- Achieves significantly higher bond to existing concrete and masonry
- Apply Zeorich SBR neat or diluted 1:1 with water to substrate
- Allow to become tacky — approximately 15–20 minutes
- Apply fresh mortar onto tacky SBR surface
- Do not allow to fully dry before applying mortar
- Replace 50–100% of mixing water with Zeorich SBR
- Apply 2 coats of SBR-modified render — 6mm per coat
- Second coat while first is still green (tacky)
- Allow full cure before backfilling or applying tiles
- Correct mix: uniform grey without dry patches
- Workability: smooth plastic consistency
- Test bond strength on sample area before full application
- Avoid application below 5°C
Ideal working temperature +5°C to +35°C. Avoid direct sunlight and extreme temperatures during application.
Always ensure the substrate is clean, dry and structurally sound before application.
Lift a tile to verify adhesive coverage — minimum 65% floor, 80% exterior and wet areas.
Mix only what can be used within the pot life. Do not add water to extend working time.
Do not exceed recommended SBR dosage — too much can delay setting and reduce strength. Store away from frost — do not allow to freeze.
Technical Data
Coverage varies with substrate condition, tile format and application method. Use our Product Calculator for exact estimates per project.
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with the Best?
Download the Technical Data Sheet, use our product calculator, or speak to our technical team for project-specific advice.