Byk -021 Mixture of hydrophobic solids and foam destroying polysiloxanes BYK Chemie Defoamer / Antifoaming agent >> Silicone Acrylic/Acrylate Resins Polyurethane Coatings >> Waterborne Inks >> Water-based Architectural / Decorative >> Exterior wall coatings Plastic coating INKS Byk® -021 is a mixture of hydrophobic solids and foam destroying polysiloxanes in polyglycol. It is used in exterior wall paints, gloss and semi-gloss paints and plastic coatings and printing inks. Silicone defoamer for aqueous coatings, especially suitable for pigmented emulsion systems based on styrene acrylate, acrylate or acrylate/polyurethane with a PVC of 18-25%. This defoamer has demonstrated improvement of microfoam in high gloss and semi-gloss aqueous coatings, specifically airless and air-assisted applied coatings. It is very effective during the production and application of aqueous coatings, it does not influence color acceptance and gloss. For incorporation, sufficiently high shear forces are required to avoid cratering. The defoamer demonstrates excellent long term stability. Mixture of hydrophobic solids and foam destroying polysiloxanes in polyglycol. Used in exterior wall paints, gloss and semi-gloss paints and plastic coatings and printing inks. OFfers very good long term stability. Provides high shear forces.