Motul RBF660 Racing Brake Fluid – 100% Synthetic

Motul RBF660 Racing Brake Fluid is engineered for high-performance braking under extreme conditions. Specially formulated for racing applications, it is designed to withstand the intense heat generated by carbon, ceramic, and conventional steel brakes, while also being suitable for hydraulic clutch systems.

With a dry boiling point of 328°C (622°F) and a wet boiling point of 204°C (399°F), RBF660 far exceeds the minimum requirements of DOT 3, DOT 4, and DOT 5.1 fluids (except DOT 5.1 viscosity at –40°C). This ensures reliable braking power in both dry and humid conditions, reducing the risk of vapor lock and fade.

Whether on track or during spirited driving, RBF660 provides unmatched stability, consistent pedal feel, and superior resistance to humidity absorption making it the go-to brake fluid for motorsport enthusiasts.

Key Features

• 100% synthetic polyglycol-based brake fluid
  
• Dry boiling point: 328°C (622°F) for extreme thermal stability
  
• Wet boiling point: 204°C (399°F) for performance in humid conditions
  
• Exceeds DOT 3, DOT 4, and DOT 5.1 standards (except DOT 5.1 viscosity at –40°C)
  
• Compatible with hydraulic brake and clutch actuators (non-silicone/mineral based)
  
• Amber color, high viscosity stability at –40°C and 100°C
  
• Trusted in motorsport for consistent braking under load
  
  

Recommendations

• Do not mix with silicone (DOT 5) or mineral (LHM) fluids
  
• Avoid contact with paint, varnish, or skin (rinse immediately if exposed)
  
• Store tightly sealed to prevent moisture absorption

Properties

• 100% Synthetic fluid, polyglycol bases 
  
• Color Amber 
  
• Dry boiling point 328 °C / 622 °F 
  
• Wet boiling point 204 °C / 399 °F 
  
• Viscosity at -40 °C (-40 °F) 1698 mm²/s 
  
• Viscosity at 100 °C (212 °F) 2.59 mm²/s