Superior formulated DOT brake fluid for for DOT 3 and DOT 4 applications. Exceeds DOT 5.1 "silicone" specifications. Synthetic Glycol-Ether formula will mix with other brake fluids conforming to US FMVSS: DOT 3/4 requirements. Lasts up to 3 years in high performance conditions. Wet boiling point: (367 deg F) exceeds DOT 3/4 (284/311 deg F).