FLEETMASTER is a heavy duty automobile and truck wash. When used through a pressure washer with 600 psi, this product removes road film, grease, grime and soils. This product is a unique combination of emulsifiers, wetting agents and soil suspension agents. Very effective even in hard water. Dilute with hot water at the rate of 1 oz per gallon and with cold water at the rate of 4 ounces per gallon. Can be used at higher concentrations if conditions warrant. Biodegradable.