Bond It 5L SBR Waterproof Concrete Latex Admixture Wall Floor Bonding Agent UK Description A premium grade SBR designed to give concrete floors and cement renders abrasion, chemical and water resistance. Bond It SBR also shows improved performance as a key coat adhesive compared to non SBR bonding agents. Uses For improving a mortar's, render's or floor screed's abrasion and chemical resistance. Providing protection during continued or intermittent water contact suitable for both external or internal use application. Key coat applications to substrates with a low porosity. For repair patching of concrete and cement screeds, to improve adhesion and flexibility of screeds. Application All surfaces should be free from laitance, oil, grease and standing water. Unsound.