- Brand: Castrol
- Liquid Volume: 1000 Milliliters
- Item Weight: 0.92 Kilograms
- Recommended Uses For Product: Brake oil
- Flash Point: 210 Degrees Celsius
- An exclusive European formula with an exceptionally high boiling point and superior anti-vapor lock characteristics
- Superior braking during arduous conditions like racing and rallying
- Typical wet boiling point is 270deg. C

















Brandi W. –
Last track day my pedal went to the floor after a few laps. Flushed fluid and ran the same track with no issues! Highly recommend! Only thing I wish they would do is offer a 500mL bottle in addition to the 1L bottle.
Danny Le –
Silicone base fluid its more compressible so i noticed the feeling of a spongy pedal right away, and it firm up when its Hot. but I feel piece of mind its not gonna fade unlike conventional fluid..
Jaymes O’Brien –
I work as a driving coach and this fluid along with Brembo HTC64 is all that ill put in my cars!
Cory –
The first time I took my car to the Tail of The Dragon by my 5th or so run my DOT3 brake fluid was boiling and that of course meant I had some pretty significant brake fade. I swapped it out with SRF DOT4 and I ran all day long with not a wiff of brake fade. Couple cons are the price but you get what you pay for and the fact that you should flush this fluid yearly.
Amazon Customer –
Takes 2 of these to properly bleed 2022 ZL1. Made dozens of laps at Sebring in 95F weather without brakes fading. Should have come from the factory with SRF.
Corey K –
I have been running SRF React in all my track-driven cars since 2018 (Subaru BRZ, Porsche 911, Alfa Romeo 4C). I have never experienced brake fade using this fluid in combination with adequate brake pads. It is ludicrously-expensive for brake fluid, but if you need the very best on-track performance, it is money well-spent as it boasts the highest boiling points of any DOT4 fluid I’ve found. For the extra money, I know I don’t have to worry about a brake failure due to inadequate fluid, and that’s huge.
xavier pinos –
Gran durabilidad durante competencias de rally
Lakey –
It doesnโt overheat