20% Non-Silicone Defoamer (AFCO 8789) is an economical, concentrated water based, non-silicone defoamer developed for water and wastewater treatment applications. It provides quick foam knock-down and sustained antifoaming performance in many systems. It is relatively unaffected by hot or cold temperatures. AFCO 8789 is a very clean running product as it contains no mineral oils, silicones or hydrophobic particulate solids.