P21S is basically the best wheel cleaner available. The famous German-made factory approved way to remove corrosive brake dust from alloy wheels. Safe, pH controlled, non-acid, non-lye based, formulas are guaranteed not to attack any type of road wheel, braking system or other automotive surface. While more costly to buy than the typical corrosive wheel cleaner found in discount houses, P21S Wheel Cleaner can be significantly cheaper to use over the long run, based on the surface safety they offer. This Regular Formula Cleaner is best for normally soiled wheels that typically receive frequent cleaning. Spray on - touch stubborn spots with a sponge and rinse off with a sharp stream of water. Available in a 500ml bottle. Includes spray nozzle and sponge for hard to reach areas.