Foam Ban defoamers/antifoams for anti-freeze and coolants are designed to provide efficient foam control and excellent compatibility, according to maker Munzing. Foam Ban EC 310 is an emulsion based on three-dimensional siloxane based in water. It is designed for use in antifreezs and coolant concentrates. The product provides excellent foam control both during filling processes and in application (ASTM D1881). Web: www.munzing.com