PBW (Powdered Brewery Wash) is a safe alkaline cleaner for everything around your brewhouse. It’s a favorite of small home breweries because it outperforms caustic chemicals without scrubbing. Just put it in your kettle, bottles, carboy, etc. in for a good long soak. NOTE: not for use on aluminum surfaces. Dissolve 1-2 ounces per gallon for kettles and 3/4 ounces per gallon for fermenters, kegs, tanks, and other equipment. (May vary depending on soil load). If circulation cleaning, heat to 130°-180° F and circulate for at least 30 minutes. If soaking, heat to 140° and soak for 4 hours or allow to soak cold overnight. Rinse thoroughly after use.