Brake fluid, also known as hydraulic fluid, is responsible for moving the various components of your vehicle’s braking system. Petroleum-based grease or oil should never come into contact with the rubber seals, pistons or other internal parts in a master cylinder, brake caliper or wheel cylinder. Third, check to see if it contains petroleum distillates or any substance that can be detrimental to soft parts. In disc brakes, lubrication points include the caliper slides and bushings, self-adjuster mechanisms on rear disc brakes with locking calipers, and the parking brake cables and linkage. Because petroleum-based products can cause incompatible seal materials to swell, rupture and leak – which could lead to fluid loss and brake failure. 78° 13° 365° 7.1. Racing brake fluid boils at a higher temperature, and can be a good solution if you are towing large loads in hilly terrain. Brake lubricant can also be used to dampen vibrations between disc brake pads and caliper pistons. Brake fluid can melt plastics pretty easily. Synthetic-based, boundary-type lubricants that come in a tube, paste or stick form have a high solids content and typically contain a variety of friction-reducing ingredients such as molybdenum disulfide (moly or MOS2) and graphite. Hello, i need to strip an enamel based paint (krylon) off some plastic models and figures and ive narrowed it down to easy off, castrol clean, and brake fluid based on research from dr. faust and other sites. For lubricating hydraulic components, such as the piston seals inside calipers and wheel cylinders, you can use a silicone-based brake lubricant or ordinary brake fluid. Generally speaking, Regardless of what type of brake lubricant you choose, always follow the supplier’s recommendations as to how their product should be used. Another synthetic-based brake lubricant uses polyalphaolefin (PAO) as its main ingredient. If it does, the entire brake system should be considered contaminated. One place you never, ever want to get any grease on is the friction surface of a brake lining – which is another reason for not using low-temperature or petroleum-based lubricants which can melt, run off and foul the linings. Moly and graphite have excellent staying power and won’t evaporate or burn off over time, and they won’t attract or hold dirt like ordinary “wet” greases can. It will not hurt the tires, brake fluid is in contact with rubber all the time, caliper seals, wheel cylinder cups, etc. This type of product is ideal for high temperature applications where long-lasting metal-to-metal lubrication is essential for good brake performance. Grease-contaminated shoes or pads will be grabby and usually cause a brake pull to one side. 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