Wonder Wheels Colour Active Super Wheel Cleaner is an acid-free wheel cleaner suitable for use on all wheel types. It removes baked on brake dust, road grime, dirt, grease & oil quickly & effectively with no brushing & minimal effort. The technologically advanced cleaning process occurs with the aid of an active indicator which turns the wheel red as it reacts with & dissolves the dirt & brake dust. It can then be washed off after 5 minutes & dirty wheels will be back to their original shine.