Hi-Mar DFC-455 Organic/ester/reacted silica Hi-Mar Specialties Defoamer / Antifoaming agent >> Silicone-free >> Silica-based Acrylic/Acrylate Resins Vinyl Dispersible in water Hi-Mar DFC-455 Organic/ Ester/ Reacted Silica Defoamer Vinyl/ Acrylic 100% Acrylic styrene/acrylic Organic, ester/reacted silica defoamer. Used for vinyl/acrylic, 100% acrylic and styrene/acrylic coatings.