Motul - RBF 660 Factory Line DOT 4 Fluid100% Synthetic Racing Fluid DOT 4 All types of hydraulic brake and clutch actuators requiring non silicone synthetic fluid Specially designed to resist to extreme temperature generated by racing carbon and ceramic brakes allowing to minimize air entrance for brake cooling Can also be used with conventional steel rotors and clutch systems Widely exceeds DOT 3, DOT 4 and DOT 5. 1 standards (except for DOT 5. 1 viscosity 40C) Dry Boiling Point: 325C