Stoner’s All-Purpose Cleaner (APC) is a fast stripping cleaner engineered for tires, rubber, whitewalls, vinyl, wheels, engines, grills, machinery, and bay floors. This concentrated formula must be diluted with water before use. We recommend mixing a 12:1 (water: APC) ratio for general cleaning and a 5:1 ratio for removing difficult, greasy dirt. Conduct a spot test before use, and adjust dilution as necessary for desired cleaning performance. APC contains a pH level of 10.