TKO conc. is a heavy-duty caustic off road cleaner. Optimum dilution of this product ranges from 1:60 to 1:100 depending upon soil and water conditions. It is designed to clean off road equipment, dozers, scrapers, front-end loaders, backhoes, etc. This product will remove carbon, grease, and other stubborn problems. It will work best in hot water or steam, and rinse free at any temperature. Do not use on automobiles, over the road trucks, or aluminum surfaces. Contains Sodium Hydroxide. USDA approved. This does have a hazmat fee.