5L SBR Bonding Agent & Waterproof Admixture - 4-in-1 Concrete Sealer, Plaster Primer & Mortar Additive for External Render, Floor Screed, Damp Proofing & Crack Prevention

SBR Bonding Agent & AdmixtureAn interior/exterior bonding and waterproofing aid, sealer, and primer. Improves water, chemical, and abrasion resistance, flexibility, plasticity, and durability. Ideal for strengthening renders, floor screeds, concrete, and patching mortars. Unlike PVA, SBR is suitable for areas subject to dampness, high humidity, and continuous water contact.Key BenefitsEnhanced Durability: Improves water, chemical, and abrasion resistance.Better Workability: Boosts flexibility, plasticity, and wet adhesion; reduces shrinkage, cracking, and surface dusting.Moisture Resistant: Perfect for high-humidity, damp, or wet environments.Application & Mixing GuideBonding Slurry (Screeds, toppings, renders): Mix 1-2 parts fresh cement with 1 part SBR by volume. Apply evenly; lay the screed/render while the slurry is still wet or tacky.Additive for Render: Prime surface first. Mix 5-7L SBR, 75kg sharp washed sand, and 25kg cement. Apply first coat (min 7mm), scratch surface, let set