Water-Based Foam Control BWF160 Nonionic Silicone Defoamer for Aqueous Foaming Systems BWF160 is a nonionic silicone defoamer developed for aqueous foaming systems. It is supplied as a milky-white flowable emulsion designed for rapid foam knockdown, continued suppression and easy dispersion in water-based systems. The product has a stated pH of 6-8 and a general reference dosage of 50-300 ppm, with final use levels determined by the actual wastewater and operating conditions.