Is Brake Fluid Flammable

Is Brake Fluid Flammable?

A vehicle’s braking system must include brake fluid. It is in charge of transferring the brake pedal’s force to the brake pads, which aids in bringing the car to a stop. But given how crucial brake fluid is to a car’s braking system, it makes sense to wonder whether or not it is flammable. This article will look at brake fluid composition, flammability, and safe handling and storage practices.

Composition of Brake Fluid

Water and glycol-based fluids are typically combined to make brake fluid. It is made to be compatible with the different components of the braking system, such as rubber hoses and seals. According to the requirements of the manufacturer and the kind of braking system a vehicle has, a particular type of brake fluid must be used in it. Brake fluid comes in three different varieties: dot 3, dot 4, and dot 5.1.

The minimum dry boiling point of glycol-based Dot 3 brake fluid is 401 degrees Fahrenheit. The majority of conventional braking systems employ it.

Glycol-based Dot 4 brake fluid has a higher minimum dry boiling point of 446 degrees Fahrenheit than other glycol-based fluids. It is appropriate for use in high-performance cars whose braking systems produce more heat.

A silicone-based fluid with a dry boiling point of 500 degrees Fahrenheit is Dot 5.1 brake fluid. It is appropriate for use in off-road and military vehicles that operate in a wide range of temperatures.

Flammability of Brake Fluid

Flammability of Brake Fluid

Let’s discuss brake fluid’s flammability now that we are more familiar with its composition. The temperature at which a substance will catch fire and ignite is known as its flash point. Depending on the specific type, brake fluid’s flash point varies, but it is typically quite high. Dot 3 brake fluid has a flash point of approximately 536 degrees Fahrenheit, while dot 4 brake fluid has a flash point of approximately 593 degrees Fahrenheit.

Brake fluid has a high flash point, but under certain conditions, it could still catch fire. For instance, brake fluid might catch fire if it leaks onto a hot surface, like the exhaust manifold. Brake fluid may also catch fire if it comes into contact with a spark or flame.

Proper Handling and Storage of Brake Fluid

It’s crucial to handle and store brake fluid properly because of the risks associated with it catching fire. Be certain to adhere to all manufacturer guidelines and safety precautions when handling brake fluid. To protect your skin and eyes from any unintentional spills or splashes, it’s a good idea to wear gloves and eye protection.

Additionally, the brake fluid needs to be kept in a cool, dry location far from any heat or ignition sources. To avoid spills or leaks, it’s a good idea to keep it in the original container with the lid tightly fastened.


In conclusion, brake fluid is not particularly flammable but it still has a chance to catch fire in some situations. To avoid any potential fires, the brake fluid must be handled and stored correctly. When working with brake fluid, always adhere to the manufacturer’s instructions and safety precautions, and store it in a cool, dry location far from any sources of heat or ignition. Your car and those around it will be safer if you handle and store brake fluid properly.