Wilwood EXP 600 Plus Super High-Temp racing brake fluid is a highly refined blend developed for extreme performance under the high heat and extreme pressure of professional motorsports. EXP 600 Plus has tested to 626 degrees F with a wet boiling point of 417 degrees F. These numbers far exceed any DOT or SAE specifications. EXP 600 Plus brake fluid has been proven to maintain a firm pedal feel and quick response and it has low-moisture affinities to slow the natural absorption rate of water vapor. For optimum performance, EXP 600 Plus should not be diluted with any other brake fluids; add new fluid to a clean system.