Castrol SRF Brake Fluid

Castrol SRF Racing Brake Fluid is an ultra high performance product formulated specifically to satisfy the ever increasing stresses placed upon the braking systems used in motorsport.

The exceptional performance of Castrol SRF is due to a novel silicon ester technology.

All conventional brake fluids used today are hygroscopic i.e. they absorb water from their surroundings.

Flexible hoses are permeable to water and in time water can find its way into the system via the hoses and seriously affect the brake fluid's performance and reduce the boiling point of the fluid.

When these bubbles form, they turn a virtually incompressible liquid into a mixture of gas and liquid which can be compressed quite considerably, thus severely reducing the efficiency of the brakes.

In this situation, a driver finds that the brakes feel spongy. Brake-pedal travel will increase and it may be necessary to 'pump' the pedal to get the brakes to function effectively.

However, when the brake fluid reaches a temperature at which the water in the fluid causes gas to be produced, which is equal to the volume swept by the piston in the brake master cylinder, vapour-lock occurs and the brakes become inoperative.

The silicon ester technology in Castrol SRF addresses this problem in two ways. Firstly, Castrol SRF is less hygroscopic than conventional brake fluids - it absorbs less water in a given time.

Unlike conventional glycol ether fluids, Castrol SRF reacts chemically with the absorbed water to reduce its adverse effects, thus preventing the fluid's high temperature performance and safety margins from deteriorating as rapidly as they would otherwise do.

The wet boiling point of Castrol SRF, 270°C, is vastly superior to the minimum requirement of 155°C demanded by the current US DOT 4 specification.

Its dry boiling point of 310°C is outstanding.

This ability to withstand temperatures in excess of 300°C, and its superior resistance to the effects of absorbed water, have established Castrol SRF as the world's premier fluid for the hydraulic brakes used in all forms of motorsport.

Don't risk it, use the BEST!