Bottle, Each - 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. For optimum performance, EXP 600 Plus should not be diluted with any other brake fluids; add new fluid to a clean system.