FermCap AT is a world-class, food-grade silicone emulsion designed to control foam during the boil and fermentation. This 1 kg bulk bottle provides a highly cost-effective solution for professional breweries. Adding just a few drops of FermCap AT significantly reduces surface tension, preventing "boil-overs" in the kettle and allowing you to fill your fermenters closer to the brim without the risk of krausen blow-offs. It does not affect flavor, aroma, or head retention when used at the recommended concentrations.