Surfynol DF-70 Organic based Air Products Defoamer / Antifoaming agent Acrylic/Acrylate Resins Vinyl Coatings >> Waterborne Surfynol DF-70. An organic-based defoamer designed specifically for water-based formulations. The product is an effective knockdown and sustained antifoamer. It is particularly suited for use in acrylic and styrene-acrylic systems. Surfynol DF-70 complies with certain FDA clearances. Product is a 100% active liquid and should be mixed prior to use. Dispersible in water. Organic based defoamer designed specifically for water-based formulations. Effective knockdown and sustained antifoamer. Suited for use in acrylic and styrene-acrylic systems. Should be mixed prior to use.