Multi-Purpose Styrene-Butadiene Rubber (SBR) Latex for Bonding, Admixture & Surface Priming

Biokil Crown SBR Bonding Agent is a high-performance, water-based styrene-butadiene latex admixture used to enhance the performance of cementitious mixes and improve adhesion between surfaces. It is suitable for use as a bonding agent, primer, mortar additive, and waterproofing enhancer in rendering, screeding, and tanking applications. This versatile product increases flexibility, reduces shrinkage, and improves water and chemical resistance.

Key Features & Benefits

• Improved Bond Strength: Enhances adhesion between cementitious materials and existing substrates.
• Water Resistance: Significantly improves resistance to water and moisture ingress in tanking and waterproofing systems.
• Increased Flexibility: Reduces cracking, shrinkage, and improves resistance to frost and vibration.
• Multi-Purpose Use: Suitable for use in renders, screeds, repair mortars, tile adhesives, and slurry primers.
• Internal & External Applications: Suitable for a wide range of cement-based construction and refurbishment uses.

Product Details

• Type: Styrene-Butadiene Rubber (SBR) latex admixture
• Form: Milky white liquid
• Packaging: 5L and 25L containers
• Chemical Base: Water-based SBR polymer
• Application: Bonding agent, surface primer, or mix additive
• Coverage: Variable depending on use (typically 6–8m²/litre as a primer)

Typical Applications

• As a bonding agent for cement-based screeds and renders
• As a primer before applying tanking slurries or waterproof coatings
• As an admixture for repair mortars to enhance flexibility and durability
• To improve waterproofing performance in damp-proofing applications

Application Instructions

1. Surface Preparation: Ensure surfaces are clean, sound, and free of oil, grease, or loose material.
2. Mixing: For bonding slurry, mix SBR with cement in a 1:1 to 1:2 ratio (by volume). For mortar or screed, replace part of the gauging water with diluted SBR.
3. Priming: Apply bonding slurry to the prepared surface and lay fresh mortar or render while tacky.
4. Curing: Protect from rapid drying and frost during the curing period.

Limitations

• Do not apply in temperatures below 5°C or to frozen surfaces.
• Not suitable for use as a standalone waterproofing system.

Health & Safety

Wear suitable PPE including gloves and eye protection. Avoid skin and eye contact. Refer to the Safety Data Sheet (SDS) for full health and handling instructions.