Silicone DOT 5 Brake Fluid exceeds FMVSS Sec. 571.116 DOT 5 silicone base motor vehicle brake fluid specifications Mixes with all fluids meeting such specifications DOT 5 brake fluid may not be mixed with DOT 3 and DOT 4 DOT 5 may be used to replace either DOT 3 or DOT 4 if a complete system flush is done For use in all drum or disc hydraulic brake systems, except systems using mineral-based fluids (LHM) Boiling Point: Dry 500degF, Wet 365degF