Wheel sealant

A wheel sealant is a protective product, similar in concept to a paint sealant or light coating, applied to clean wheel faces to create a barrier between the metal or finish and the brake dust, road grime and heat the wheels are exposed to. It is applied to a fully clean, decontaminated wheel and cured before the wheel is used normally again.

It matters because wheels accumulate contamination faster than any other part of the car, with brake dust in particular being both abrasive and, over time, capable of etching into an unprotected finish if left to sit. A sealed wheel lets grime sit on top of the barrier rather than bonding directly to the wheel, so a normal wash with a wheel cleaner and brush removes it far more easily.

Look for a sealant rated for the heat wheels experience near brakes, since general purpose paint sealants are not always suited to that environment. Apply to a wheel that has been decontaminated with an iron remover first, not just washed, since sealing in existing brake dust defeats the purpose. A common mistake is skipping reapplication schedules, since wheel sealants generally wear faster than paint sealants due to constant heat and road spray exposure.