Castrol Brake Fluid DOT 4 is a high-performance, synthetic hydraulic fluid engineered from a mixture of polyalkylene glycol ethers and borate esters, combined with advanced additives and inhibitors. Designed for use in all hydraulic brake and clutch systems—including disc, drum, and ABS-equipped systems—it is specifically formulated to provide reliable performance in vehicles exposed to severe driving conditions.

Key benefits of this product include:

• Vapor Lock Protection: Its high dry and wet boiling points significantly reduce the risk of vapor lock and brake fade, ensuring consistent stopping power even under extreme temperatures.
• System Longevity: The advanced formulation provides outstanding protection against corrosion and sludge formation, helping to preserve the integrity of both metal and rubber components within the braking system.
• Industry Compliance: It meets or exceeds major global industry standards, including FMVSS 116 DOT 4, ISO 4925 (Class 4), SAE J1703, SAE J1704, and JIS K 2233.
• Compatibility: It is fully compatible with other fluids meeting FMVSS 116 DOT 3 and DOT 4 specifications, though it is recommended to avoid mixing to maintain peak performance.