Super Hydraulic Brake & Clutch Fluid Dot 4+ is a heavy duty synthetic brake fluid blended mainly from glycol ethers and polyglycols. It also contains corrosion and oxidation inhibitors to enhance its natural corrosion- and chemical stability. Super Hydraulic Brake & Clutch Fluid Dot 4+ is recommended for use in both disc and drum brake systems requiring both Dot 3 and Dot 4 fluids. It is also used in clutch hydraulic systems.