Hi-Mar DFC-505 Nonionic Thornley Company Defoamers / Anti-Foaming Agents Polyvinyl acetate emulsions & derivatives (PVAc…) Polyvinyl Alcohol (PVOH) ADHESIVE A 100% active nonionic defoamer imparting excellent foam control in a wide variety of applications. It is particularly effective in controlling foam in general adhesive systems including polyvinyl alcohol and polyvinyl acetate, providing smooth films free of defects. 100% nonionic defoamer for adhesives. Imparts very good foam control. Provides smooth films free of defects.