Castrol React SRF Racing Brake Fluid 1 Litre Bottle
15C540
All Prices Include VAT
Regular price
£94.56
Castrol React SRF Racing Brake Fluid – 1 Litre
Castrol React SRF Racing is widely regarded as the ultimate high-performance brake fluid for motorsport and extreme braking environments. Designed specifically for competition use, SRF is trusted in racing, rallying, and high-performance track day applications where consistent pedal feel, strong initial bite, and fade resistance are critical.
This exclusive Castrol formulation uses advanced, patented technology to deliver exceptional braking stability under sustained high temperatures. With an extremely high dry boiling point exceeding 300°C, Castrol SRF dramatically reduces the risk of vapour lock and brake fade during repeated heavy braking.
In addition to thermal stability, Castrol React SRF is known for providing a firmer brake pedal feel, improving driver confidence and delivering stronger initial bite under braking — particularly noticeable during high-speed or threshold braking on track.
Castrol React SRF Racing exceeds all major international brake fluid standards, including DOT 3, DOT 4, ISO 4925, JIS K2233, and SAE J1703, making it suitable for the vast majority of high-performance road and motorsport brake systems.
For maximum efficiency and performance, Castrol recommends replacing the fluid no later than every 18 months, particularly in competition or track-driven vehicles. Prolonged use beyond this period may lead to reduced low-temperature performance.
At Rennworks Performance, Castrol SRF is a workshop-proven choice for Porsche, McLaren, and other high-performance vehicles, where braking confidence and pedal consistency are non-negotiable.
Key Benefits
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Extremely high dry boiling point (>300°C)
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Outstanding resistance to brake fade under extreme use
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Firmer pedal feel with improved initial bite
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Consistent braking performance during prolonged heavy braking
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Designed specifically for motorsport and competition applications
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Exceeds DOT 3 and DOT 4 specifications
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Suitable for disc and drum brake systems (excluding mineral oil systems)
Application & Service Life
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Recommended Service Life: Replace within 18 months for maximum performance
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Suitable For:
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Racing
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Rallying
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Track days
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High-performance road cars
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Specifications
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Brake Fluid Type: DOT 4 (exceeds DOT 3 & DOT 4 requirements)
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Dry Boiling Point: >300°C
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Standards: FMVSS 116 DOT 3 & DOT 4, ISO 4925, JIS K2233, SAE J1703
Packaging
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Container Size: 1 Litre
We offer professional installation services directly in the Rennworks workshop, where your product will be expertly fitted and fully set up for optimal performance. To book an installation appointment, simply contact us and we’ll be happy to arrange a time that suits you.
Not sure if this product is the right fit for your vehicle? We’re here to help. Our team can quickly check compatibility and make sure you’re choosing the correct item before you buy. Just reach out with your vehicle details, and we’ll confirm everything for you.
Some product images are for illustrative purposes only and may show a generic or representative version of the item. Actual components may vary slightly depending on vehicle application or specification, but all products supplied will match the description and meet our quality standards.
Most orders are processed within 1–2 business days and usually ship within 3–7 business days. Not all items are held in stock, as some products are bespoke and made to order — for example, certain coilover suspension kits and exhaust systems — and delivery times may be longer in these cases. Where this applies, we’ll keep you fully informed and confirm expected dispatch dates as soon as possible. If you’d like to check availability or lead times, feel free to contact us before making a purchase.