United Superior Brake Fluid DOT 5.1 is a non-silicone, non-petroleum automotive brake fluid that is designed for use in conventional hydraulic brake and clutch systems, particularly in extreme service conditions where DOT 5.1 fluids are recommended. Provides an additional safety margin against "vapor lock" compared with brake fluids meeting less stringent specification requirements.

United Superior Brake Fluid DOT 5.1 is suitable for use in braking systems requiring DOT 3, DOT 4, SAE J1703 or SAE J1704 fluids. It is also suitable for vehicles with anti-locking brake systems (ABS), hydraulic clutch systems requiring conventional fluids, passenger cars, commercial road transport, off-highway vehicles, agricultural tractors and motorcycles. Do not use in the systems designed for mineral oil-based fluids, e.g., certain Citroen models, or where Silicone DOT 5 fluids are recommended.