OTUL BRAKE CLEAN REFILL is a water-based, surfactant-free, quick-drying cleaner. It is the ideal product for removing oil and grease-containing dirt. e.g. from brakes (drum and disc brakes. brake pads. cylinders. springs and bushings). from clutches (clutch hub and clutch parts). ) and all other mechanical parts. which must be free of grease for future use.