Assures optimal extraction. Use as a desudsing agent when cleaning upholstery or for carpets previously cleaned with shampoo or spray foam. For use in the recovery tank of all hot water extraction or deep-cleaning carpet machines. Rug doctor Anti-Foam prevents sudsy build-up n the recovery tank of a cleaning machine caused by detergent residue in carpets or upholstery previously cleaned with shampoo or spray foam. Anti-foam's desudsing action assures optimal vacuum pressure for water extraction, leaving carpets and upholstery drier after cleaning.