Highly Concentrated Silicone Blend that Controls Foam Buildup within Steam/Hot Extraction Recovery Tanks…Excessive Foam Can Originate from Spot Removers, Foamy Carpet Residues, & Upholstery Cleaners, and Foam an Increase Extraction Time & Decrease Vacuum Quality For Use On: Steam/Hot Water Extraction Recovery Tanks for Carpets & Upholstery Directions for Use: Add 2 Ounces (59ml) of ZEP Commercial Anti-Foam Solution within the Extraction Machine’s Recovery Tank.