Ready to use. Spray onto surface and let sit several minutes. The product will turn red as it reacts with brake dust/rail dust iron. For heavy buildups use a brush, sponge or mitt. Rinse thoroughly using high pressure water.
Recommend wearing Nitrile gloves when applying product to wheels as the smell is very unpleasant and stays on the hands for hours.
WARNING: Some products may contain chemicals such as DEHP, which can cause cancer, birth defects or other reproductive harm. For more info go to