SMOKE HOUSE CLEANER is a USDA approved cleaner and kitchen degreaser designed for use in Bar-B-Q, Chinese, and other type restaurants where carbon stain, grease, oil, tar and burned-on grease is a problem. Best when applied with pump up sprayer and steamed or hot water rinsed off. Do dilute, as 1 drum makes 2. Dilution rate is 1:100 with hot water pressure washers. Contains Sodium Hydroxide. DOT hazardous. When buying more than 2 gallons at a time there will be an additional hazmat fee added to the shipping.