Castrol React SRF Synthetic Racing Brake Fluid 1 "a"


Castrol React SRF Synthetic Racing Brake Fluid


Castrol React SRF Racing Brake Fluid

Castrol React SRF Racing Brake Fluid is an ultra-high performance brake fluid popular with many of the highest performing auto racing teams around the world.  The key to Castrol SRF brake fluid's superior performance is its silicon-ester technology.  Not only is it less hygroscopic (i.e., it absorbs less water) than typical glycol-based brake fluids, Castrol SRF also reacts chemically with any absorbed water to further reduce its adverse effects on high-temperature braking performance. The result is an almost unheard of 518° F (270° C) wet boiling point -- more than 100° F higher than most other racing brake fluids!

Exceeds SAE 1703, ISO 4925, JIS K2233, FMVSS No. 116 DOT3 and DOT 4 specifications.

Note: Castrol SRF is not a silicone-based brake fluid (e.g., DOT 5) and is compatible with most factory brake systems and fluids.  Always follow vehicle manufacturer's recommendations when adding brake fluid.


  • Dry Boiling Point: 590°F (310°C)
  • Wet Boiling Point: 518°F (270°C)
  • Superior anti-vapor lock properties
  • One-liter (1000ml) bottle

The Ultimate Auto Racing Helmet Buyer's Guide

We’ve sold tens of thousands of helmets here at Competition Motorsport and, in the process of doing that, answered a million questions (probably) about them. With that in mind, this article will give you the real lowdown on selecting a proper auto racing helmet. We’ll go over the why’s and how’s of size, shape, certification, pricing, features, and maintenance so you have the tools you need to select the perfect helmet.

Learn More

Driver Gear

If you wear it to protect yourself while racing, the Competition Motorsport Driver Gear collection is where you'll find it!

Racecar Gear

If you mount it on or install it in your vehicle for track days or wheel-to-wheel racing, the Competition Motorsport Racecar Gear collection is where you'll find it!

American Express Apple Pay Discover Google Pay Klarna Maestro Mastercard PayPal Shop Pay Visa