Butonal NS 175 Styrene-butadiene BASF Styrene copolymer >> Styrene butadiene emulsions SEALANT Butonal NS 175 High solids, cold polymerized anionic styrene-butadiene dispersion; Solids = 71%, Viscosity = 1200 mPa.s, pH = 10.4, Spec. Gravity. = 0.94; Used to modify asphalt cements when used in hot mix and chip seal application. High solids, cold polymerized anionic styrene-butadiene dispersion. Used to modify asphalt cements when used in hot mix and chip seal application.