Castrol SRF Racing Brake Fluid


The ultimate brake fluid, especially for those who do not flush their brake systems regularly. 

Castrol SRF has the highest wet boiling point in the industry, which is of great importance for fluid that is older than 6 months.

  • Exceptionally high wet boiling point
  • Ideal for those who do not flush their brake fluid regularly


In Stock


We’re happy to offer Castrol SRF Racing Brake Fluid directly from MPP! As you all know, racing brake fluid is a requirement for a high-power car. Boiling brake fluid is not a good time, and can result in a brake pedal that is very long, or in extreme cases, not there at all. At MPP, we’ve decided to offer two different types of brake fluid based on how often you plan to flush your brake fluid.

When brake fluid absorbs water, its boiling point drops drastically. So if you’re planning to change your fluid often, it makes sense to use a cost-effective fluid with a high boiling temperature. If you are the type that wants to “set it and forget it” in a sense, then it makes sense to use a fluid with the highest possible wet boiling point.

To learn more about different types of brake degradation, and how this can be avoided, please see our article here.

MPP Recommended Brake Fluid Boiling Points:

Pagid Racing Brake Fluid: Dry: 626F (330C) / Wet: 392F (200C)

Castrol SRF: Dry: 617F (325C) / Wet: 518F (270C)

Our recommendation is that if you’re flushing the multiple times per year, the Pagid fluid is the way to go. If you’re going to flush the fluid only once every 18 months to 2 years, the SRF is the fluid of choice. At that point, especially in a humid environment, the fluid will have absorbed a significant amount of water and the “wet” boiling point will be a more accurate representation of the performance you can expect.


Castrol SRF Racing Brake Fluid:

Castrol SRF racing brake fluid has an exceptionally high wet boiling point. This fluid is compatible with all DOT 3 and DOT 4 systems. That being said, any mixing of SRF with other brake fluids will reduce the quality of the fluid, so a full flush is recommended. Castrol recommends the fluid be changed every 18 months at the most to maintain optimal performance.



  • Store brake fluid only in its approved original container
  • Dispose of used brake fluid responsibly
  • Keep brake fluid clean and dry


  • Size: 1.0L
  • Dry Boiling Point: 325C / 617F
  • Wet Boiling Point: 270C / 518F
  • Color: Yellow, Clear & Bright

Additional information



Dry Boiling Point

325C / 617F

Wet Boiling Point

270C / 518F


Yellow, Clear & Bright


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