Five Star Chemicals PBW, Powdered Brewery Wash, is the only patented non-caustic cleaner designed to clean stainless steel and safe for use on glass, copper, plastic, brass and ceramic equipment. Environmentally friendly and safe to handle. Now you can clean without scrubbing and sanitize without rinsing - just let it soak overnight! Use 2 oz. per 5 gallons warm water, soak for 30 minutes and rinse with warm water. 50 pound container.