The R 600+ racing brake fluid is approved to be used in all DOT 4 applications. It has a dry boiling point in excess of 600ºF (307ºC) and is used by top racing teams in all types of competition (GP2, British GT, FIA GT, Sports Prototypes, BTCC, British F3, British Rally, Radicals, Minis etc.). Although it can be mixed with other synthetic racing brake fluids we recommend that you flush the system with R 600+ to ensure no residue left in the system.