Hi-Mar DFC-19 Silica Hi-Mar Specialties Defoamer / Antifoaming agent >> Silicone-free >> Silica-based Acrylic/Acrylate Resins Alkyd Resins Polyurethane Vinyl Not dispersible in water Hi-Mar DFC-19 Organic/ Reacted Silica Defoamer Vinyl/ Acrylic 100% Acrylic Styrene/ Acrylic W/R Alkd/ Urethane Industrial Maintenance Coatings May cause Gloss Reduction Organic reacted silica. Used as a defoamer for vinyl/acrylic, 100% acrylic, styrene/acrylic, alkyd/urethane and industrial maintenance coatings. Can cause gloss reduction.