Byk -320 Polyether modified methylalkylpolysiloxane copolymer BYK Chemie Flow / Levelling agent >> Silicone Scratch/ Srcub/ Mar resistance agent >> Silicone-based Slip control >> Silicone Coatings >> Solventborne Coatings >> Waterborne Automotive OEM Automotive refinishing General Industrial /Maintenance White spirits/methoxy-propylacetate 9:1 Byk® -320 is a solution of a polyether modified poly-methyl-alkyl-siloxane. Silicone levelling additive with defoaming action. It improves the surface properties of solvent-based coatings, with particular emphasis upon levelling. Causing only a slight surface tension reduction, in contrast to most silicone additives it does not stabilize foam and can even impart defoaming action. BYK®-320 is particularly suitable for non-polar to medium-polar paint systems. Its defoaming activity rises with increasing coating polarity. BYK®-320 increases surface slip and thus improves scratch and mar resistance. Formation of Bénard cells is prevented and orientation of flatting agents is improved. In automotive and industrial coatings, BYK®-320 will not exhibit problems with ghosting and telegraphing. To avoid these effects, the additive must be present in the paint which has to be overcoated. Solution of a polyether modified poly-methyl-alkyl-siloxane. Used in automotive and industrial coatings. Provides increased surface slip. Offers improved scratch and mar resistance. Prevents the formation of Bénard cells. Possesses improved orientation of flatting agents.