Byk -065 Polysiloxanes BYK Chemie Defoamer / Antifoaming agent >> Silicone Acrylic/Acrylate Resins Alkyd Resins Chlorinated Rubber Vinyl Coatings >> Solventborne Wood & Furniture Coatings Cyclohexanone Byk® -065 is a solution of foam destroying polysiloxanes. Silicone defoamer for solvent-based coating systems to prevent foam and bubble formation during paint production, filling and application. BYK®-065 is preferably used in the following systems: chlorinated rubber, vinyls, acrylates, wood protective varnishes (based on long oil alkyds), machinery paints (based on medium oil alkyds). Solution of foam destroying polysiloxanes. Used in wood protective varnishes and machinery paints. Prevents foam and bubble formation.