This powerful non-acid wheel cleaner safely removes brake dust, grease, dirt and oil from all types of OEM wheels (including aluminum and magnesium) without scrubbing. Simply spray on and rinse off. The highly concentrated (up to 10:1) formula effectively cleans wheels and tires at the same time. CONTAINS NO HYDROFLUORIC ACID, AMMONIUM BIFLUORIDE OR CAUSTICS. Great for manual dilution or automatic dilution/proportioner systems.