Prestone synthetic brake fluid provides corrosion protection for all metals within the braking system and meets or exceeds DOT 3 and DOT 4 specifications, for excellent performance in high-temperature braking systems. This formula substantially reduces the possibility of fluid vaporization and eventual brake failure (as a result of vapor lock) by maintaining a high wet boiling point. Recommended for all ABS, disc and drum brake systems as well as hydraulic clutches requiring DOT 3 and DOT 4 fluids. Compatible with all conventional brake fluids.