Castrol® 12512 - SRF React DOT 3/4 Brake Fluid

1 review|Item # mpn1582432308|Similar Products
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Vehicle Fitment

This part is universal

Product Details

Universal SRF React DOT 3/4 Brake Fluid by Castrol®. SRF React Dot 3/4 Racing Brake Fluid by Castrol®. The compressibility of Castrol React SRF Racing is very similar to that of current DOT 3 and DOT 4 fluids. It can therefore be filled into any braking system used in motor sport with the exception of those for which a mineral oil is prescribed. It gives a "hard pedal" feel.


US FMVSS 116 DOT 3 and DOT 4.
SAE: J1703.
ISO: 4925
Volume: 1 Liter
Typical Wet Boiling Point: 518°F (270°C)
Typical Dry Boiling Point: 590°F (310°C)
Quantity: 1 Bottle
Fluid Standard: DOT 3/4


  • Widely used in racing, from Formula One, sports cars, V8 Supercar and Grand Prix and Superbike motorcycles
  • The exceptionally high dry boiling point (higher than 300°C) makes Castrol React SRF Racing ideal for use under arduous braking conditions such as rallying or racing. It exceeds the boiling point requirements of DOT 5 brake fluids
  • Very high vapour lock point and has the additional advantage of sustaining high vapour lock point characteristics during its service life
  • It is miscible with all conventional fluids meeting the US Federal Standards FMVSS 116 DOT 3, DOT 4 and DOT 5.1, ISO 4925 and current SAE J1703. This means that changing the brake system to Castrol SRF is easy. Drain and flush out the conventional brake fluid with Castrol SRF then top up the system with Castrol React SRF Racing. Although Castrol React SRF Racing is miscible with conventional brake fluids, topping up Castrol React SRF Racing with conventional brake fluids will reduce the benefits of the product
  • It is compatible with seal rubber and metal materials used in brake systems using conventional polyglycol brake fluids
  • It is similar in viscosity to conventional brake fluids so is easy to bleed like conventional brake fluids

Application: For all braking systems where conventional or polyglycol brake fluids are recommended in high performance vehicle and competition applications. Highly recommended for cars used for "Club and Track days".

Castrol® is the world leading manufacturer, distributor and marketer of premium lubricating oils, greases and related services to automotive, industrial, marine, aviation, oil exploration and production customers across the world. The company is headquartered in the UK and operates directly in over 46 countries, and employing approximately 7,500 staff worldwide. In nearly 74 other countries, Castrol is represented by third party distributors who market and sell it's products locally. The Castrol delivery network extends throughout 120 countries, covering 800 ports and partnering with over 2000 distributors and agents. Castrol offers lubricants for virtually all domestic, commercial and industrial applications. For automotive lubrication (including motorcycles 2-stroke and 4-stroke engines, car petrol and diesel engines), products include an extensive range of manual and automatic transmission fluids, chain lubricants and waxes, coolants, suspension fluids, brake fluids, greases, cleaners and maintenance products.

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Castrol® 12512 - SRF React DOT 3/4 Brake Fluid
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Castrol® - SRF React DOT 3/4 Brake Fluid
Had pretty good brakes..... I thought. T1 VIR quickly showed me I did not have the brakes I thought I did. Solid rotors at 100mph and trying to stop do not add up well. Talked to my friend and got some pointers on what was working on his road racing Z. Brake fluid change to SRF React, Hawk Blues in front, Porterfield shoes on the back and Redline red grease to withstand the heat. Now I have brakes!
Posted by Customer / April 12, 20221972 Nissan 240Z

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