(2) 500ml Motul RBF 600 Factory Line DOT 4 RACING BRAKE FLUID. Efficient when rainy : The very high wet boiling point (205°C / 401°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 an efficient brake system when rainy.