MOTUL RBF 660 Racing Factory Line DOT 4 100% Synthetic Brake Fluid 1/2L (Set of 12 Units) 101667

MOTUL RBF 660 Racing Factory Line DOT 4 is a 100% synthetic brake fluid designed for hydraulic brake and clutch systems that require non-silicone fluids. It is particularly well-suited for racing applications, withstanding the high temperatures generated by carbon and ceramic brakes while minimizing air intrusion for improved cooling. Compatible with conventional steel disc brakes and clutch systems, this fluid surpasses DOT 3, DOT 4, and DOT 5.1 standards in most areas, although its viscosity at -40°C does not meet the DOT 5.1 specification.

PERFORMANCE
STANDARDS : FMVSS 116 DOT 4 / SAE J1703 & J1704 / ISO 4925

Extreme thermal resistance and stability:
Very high boiling point (325°C / 617°F), superior to conventional DOT5.1 non silicone base / DOT5 silicone base fluids (260°C / 500°F mini) and DOT4 (230°C / 446°F mini)

Enables effective brake even in extreme conditions.
Better aerodynamic performance by reducing air entrance for brake cooling for cars.

Efficient when rainy:
Very high wet boiling point (204°C / 400\°F) superior to conventional DOT 5.1 non-silicone base fluid (180°C / 356°F mini) and DOT 4 (155°C / 311°F mini enables to keep efficient braking while rainy. Brake fluids tend to absorb humidity from the air, which reduce boiling point and increase the risk to get vapour lock phenomena. The wet boiling point is measured by humidifying the product with about 3.5 % of water.

RECOMMENDATIONS
Avoid mixing with polyglycols based brake fluid.
Do not mix with silicone (DOT 5 silicone base) or mineral base fluids (LHM).
Store brake fluid in its original container, tightly closed to prevent moisture absorption.
Aggressive chemical product if contact with hands, paint or varnish. If skin contact, rinse thoroughly with water.

PROPERTIES
100% synthetic fluid, polyglycol bases.
Color Amber
Dry boiling point 325°C / 617°F
Wet boiling point 204°C / 400°F
Viscosity at -40°C (-40°F) 1698 mm°/s
Viscosity at 100°C (212°F) 2.59 mm°/s

Technical Bulletin
Material Safety Data Sheet