Liqui Moly DOT 4 is a synthetic brake fluid based on glycol ethers, alkylene polyglycols and glycol ether esters. It contains inhibitors that prevent corrosion of metallic brake components and reduce oxidation at elevated temperatures. Liqui Moly DOT 4 is specially formulated to extend the life of components in automotive hydraulic brake and clutch systems. The brake fluid has a high wet and dry boiling point. Special moisture flushing agents help protect against vapour bubble formation. Liqui Moly DOT 4 is miscible and compatible with all high quality synthetic brake fluids. However, optimum service life is only guaranteed when used unmixed.