Byk -1660 Siloxylated polyethers BYK Chemie Defoamer / Antifoaming agent >> Silicone Acrylic/Acrylate Resins water Byk® -1660 is emulsion of siloxylated polyethers. BYK®-1660 is recommended for styrene-acrylic and pure acrylic systems with a PVC range of 35-70. Due to its chemical composition, the defoamer can be added during any stage of production. Even with low shear forces during the let down stage no defects are created in the coating. The defoamer shows excellent long term efficiency and has no negative influence on color acceptance. It is used in emulsion paints interior, semi gloss paints and high gloss emulsion lacquers. Emulsion of siloxylated polyethers. Used in emulsion paints interior, semi gloss paints and high gloss emulsion lacquers. Offers very good long term efficiency. No negative influence on color acceptance.