High performance brake and clutch fluid designed to lubricate and protect critical brake system componentry while providing reliable stopping power. Anti-vapor lock formulation maintains responsiveness and performance by fighting both water contamination and vaporization. Advanced chemistry resists corrosion, oxidation and is compatible with SBR, EPDM and natural rubbers. Exceeds the requirements of US FMVSS 116 DOT 5.1, DOT 3 & DOT 4, SAE J1703, SAE J1704 and ISO 4925 (Classes 3, 4 and 5.1), mixes with other DOT 3, DOT 4 AND DOT 5.1 Brake Fluids. Excellent boiling points: Dry Boiling Point 516°F (269°C), Wet Boiling Point 369°F (187°C).