Platinum SBR Bonding Agent - 25 Litre. Platinum SBR Bonding Agent is a High Strength 42% Styrene Butadiene Copolymer Latex which is specially modified to be compatible with cement based mixes (Ordinary Portland Cement or high aluminium cement). It may be incorporated into cementitious renders, screeds or patching mixes in order to improve adhesion and abrasion resistance. It can be used internally or externally and in areas of continuous or intermittent water contact. Platinum SBR Bonding Agent improves the chemical and water resistance of cementitious mixes and is recommended for use in effluent tanks, dairies, food factories, fertiliser stores etc.