P21S Gel Wheel Cleaner 5 liter Canister

P21S is the wheel cleaner recommended by Mercedes-Benz, Porsche, BMW, Volkswagen, Audi, and Volvo, and this 5-liter canister is the refill size for anyone who has already discovered why. The gel formula is thicker than standard liquid wheel cleaners, which means it clings to vertical wheel surfaces and stays in contact with brake dust and grime long enough to actually break it down rather than running off immediately.

What makes P21S stand apart from cheaper wheel cleaners is the acid-free formulation. Acid-based cleaners eat through brake dust fast but can also damage wheel coatings, clear coats, and bare aluminum over time. P21S avoids that risk entirely while still handling the kind of heavy soiling that comes from spirited driving, softer brake pads, or infrequent cleaning. Spray the gel on, let it stand for up to two hours on stubborn spots, touch any remaining areas with a sponge, and rinse with a sharp stream of water.

At the 5-liter size, this canister provides enough cleaner for months of regular wheel maintenance. A heavy-duty sprayer with a six-foot hose is available separately for easier dispensing from the canister.