Castrol React SRF Racing is a high performance brake fluid of extraordinairy quality for use in race cars and track day cars.
This is an exclusive Castrol product which is patented worldwide.

Castrol SRF React Racing exceeds US Federal Standards FMVSS 116 DOT 3 and DOT 4, ISO 4925, JIS K2233 as well as current SAE J 1703
The dry boiling point of Castrol React SRF Racing is extremely high (320 °C) which makes it ideal for heavy use during races or in rallies.

Due to the special characteristics of this fluid you can use it for a period up to 18 months. After that, the brake fluid needs to be replaced.