CRC De-Squeak prevents brake noise before it occurs. Metallic bonding formula fills grooves and imperfections in friction surfaces that commonly cause squeaks and squeals. Use CRC De-Squeak on new, freshly cut (turned) or existing brake rotors and drums. CRC De-Squeak is safe for use on all types of brake systems, including disc, drum and ABS. Prevents rust and oxidation build up.