Castrol SRF DOT 4 Low Temp Brake fluid

With an exceptionally high dry boiling point above 300 degrees Celsius, this brake fluid helps resist vapour lock and brake fade during racing, rallying and track days. Its performance remains stable throughout the service life, making it a trusted choice across professional motorsport categories.

Castrol React SRF Racing is suitable for braking systems using conventional brake fluids in high performance road and competition vehicles. It is compatible with DOT 3, DOT 4 and DOT 5.1 fluids, making system changeover simple, and it is easy to bleed thanks to a viscosity similar to standard brake fluids.

Ideal for club and track day cars, competition vehicles and high performance applications where reliable braking is critical.

• Widely used in racing, from Formula One, sports cars, V8 Supercar and Grand Prix and Superbike motorcycles.
  
• The exceptionally high dry boiling point (higher than 300°C) makes Castrol React SRF Racing ideal for use under arduous braking conditions such as rallying or racing. It exceeds the boiling point requirements of DOT 5 brake fluids.
  
• Very high vapour lock point and has the additional advantage of sustaining high vapour lock point characteristics during its service life.
  
• It is miscible with all conventional fluids meeting the US Federal Standards FMVSS 116 DOT 3, DOT 4 and DOT 5.1, ISO 4925 and current SAE J1703. This means that changing the brake system to Castrol SRF is easy. Drain and flush out the conventional brake fluid with Castrol SRF then top up the system with Castrol React SRF Racing. Although Castrol React SRF Racing is miscible with conventional brake fluids, topping up Castrol React SRF Racing with conventional brake fluids will reduce the benefits of the product.
  
• It is compatible with seal rubber and metal materials used in brake systems using conventional polyglycol brake fluids.
  
• It is similar in viscosity to conventional brake fluids so is easy to bleed like conventional brake fluids.