Hi-Mar LB-1755-A Organic/ester/reacted silica Hi-Mar Specialties Defoamer / Antifoaming agent >> Silicone-free >> Silica-based Acrylic/Acrylate Resins Vinyl Dispersible in water Hi-Mar LB-1755-A Organic/ Ester/ Reacted Silica Defoamer PVA Vinyl/ Acrylic Organic, ester/reacted silica defoamer. Used for PVA and vinyl/acrylic coatings.