Grease And Brake Fluid Attract Dirt And Grime To Critical Brake Components. These Surfaces Must Be Kept Clean To Ensure Accurate Adjustments And Smooth Brake Operation. Permatex Non-Chlorinated Brake & Parts Cleaner Flushes Away Fluids, Grease, And Dirt, Leaving No Contaminant-Attracting Residue Or Chlorinated Solvent Runoff. Use On Drums, Calipers, Discs, Shoes, Pads, Springs And Cylinders. Can Be Applied Without Disassembling The Brake Unit Since Brake & Parts Cleaner Will Penetrate To Clean. Voc Compliant, 50-State Legal. Penetrates, Dissolves Dirt And Oil.