You may freeze, but your United 956 DUO-ZYME won’t. Finally, a product made for walk-in freezers and coolers. United 956 is a natural-powered drain system maintainer and cleaner for food-service areas, but at the right dilution rates, this formulation also provides protection against freezing for applications in colder temperatures. Even in cold temperatures, United 956 cuts through dirt and grease to make your cleaning a breeze. Contains no added dyes and perfumes. Earth Smart® Certified.