Byk -020 Modified polysiloxane copolymer BYK Chemie Defoamer / Antifoaming agent >> Silicone Amino Resins Coatings >> UV / Radiation Curing Inks >> Water-based Coatings >> Waterborne Wood & Furniture Coatings Metal Other industry >> Paper coatings INKS Butylglycol/ethylhexanol/white spirit (6/2/1) Byk® -020 is a solution of a modified polysiloxane copolymer. Silicone defoamer to prevent formation of foam and bubbles during paint production and application. BYK®-020 is most suitable for aqueous coatings that are used as air drying and baking primers or UV-curing coatings for metal, wood and paper and printing inks. Solution of a modified polysiloxane copolymer. Used in metal, wood and paper coatings and printing inks. Prevents formation of foam and bubbles.