CRC Mag Monster is formulated with powerful iron emulsifiers to penetrate brake dust and quickly clean your wheels. By attacking the brake dust underneath road grime, it allows for a complete clean, leaving your wheels shining, with minimal effort. You will be able to see the product begin working immediately, turning purple as it gently cleans. CRC Mag Monster is pH neutral, acid free, and safe on all painted, chromed, alloy, and plastic dipped wheels. CRC Mag Monster has been formulated to have a pleasant scent, eliminating the sulphur odour commonly associated with brake dust removers. Note: Optimised for iron brake dust removal. Not suitable for white wheels, unsealed or porous surfaces.