BYK® -W 940

BYK® -W 940 by BYK is a solution of an unsaturated polycarboxylic acid polymer with a polysiloxane copolymer. Acts as a wetting and dispersing additive for mineral fillers in unsaturated resin systems and adhesives. The additive prevents the flooding/floating and settling of pigments and fillers in epoxy and VE/UP-based laminates. Reduction in the flooding/floating of colored pigments in gel coats. Is primarily used in color pastes and gel coats based on unsaturated polyester resins and as an additive for floor coatings. Recommended dosage for BYK® -W 940 is 0.5-3% in inorganic pigments, 2.5-5% in organic piments and 0.5-1.5% in fillers based upon solids.