MOTUL RBF660 Racing Brake Fluid is 100% fully synthetic polyglycol high temperature DOT 4 racing brake fluid.
Rated with a dry boiling point of 328ºC and a wet boiling point of 204ºC.
Widely exceeds DOT3, DOT4 and DOT5.1 standards (except for DOT5.1 viscosity at - 40°C).
Suitable for all types of Motorsport.
Supplied in a 500ml bottle.
MOTUL RBF660 Racing Brake Fluid specifications:
- 100% Synthetic fluid, polyglycol bases.
- Dry boiling point 328°C/622°F
- Wet boiling point 204°C/399°F
- Viscosity at -40°C (-40°F) 1698 mm²/s
- Viscosity at 100°C (212°F) 2.59 mm²/s
TYPE OF USE:
- All types of hydraulic brake and clutch actuators requiring non-silicone synthetic fluid
- Specially designed to resist to extreme temperature generated by racing carbon and ceramic brakes allowing minimising air entrance for brake cooling
- Can be also used with conventional steel discs and clutch systems actuators
Dry Boiling Point vs Wet Boiling Point Explained:
- The dry boiling point refers to the boiling temperature of fresh, brand new brake fluid. Whereas the wet boiling point refers to the temperature DOT brake fluid begins to boil after it has absorbed 3.7% water by volume. DOT brake fluid will reach this level of water volume after roughly 2 years of use, which is why it is advisable to renew the brake fluid every 1-2 years. (it is not uncommon for track cars to replace the brake fluid every 3-6 months, or racers to replace the brake fluid every single event)
note: do not mix brake fluids, perform a flush with the brake fluid you intend to use.
note: image is for illustration purposes and may differ on delivery
UK DELIVERY & STOCK INFORMATION
We hold one of the most extensive ranges of performance parts in the UK through our trusted supplier network. Most in-stock items are dispatched the same working day when ordered before 2PM.
If something isn’t currently in stock, it’s usually unavailable anywhere else - but we’ll always do our best to source it quickly and keep you updated.
Keep an eye on the stock status shown on each product - this provides an accurate guide to availability and lead times. On rare occasions, supplier updates may cause small variations in delivery times.
- FAST UK DISPATCH
- MULTIPLE WAREHOUSES
- ORDER SUPPORT
RETURNS & WARRANTY
We always aim to make sure you’re happy with your order, and our team is here to help if there’s ever an issue.
Unused items can be returned within 14 days of delivery for a refund or exchange, provided they’re in original packaging and resellable condition.
Some products may be subject to a restocking or processing fee, and custom or made-to-order items (such as brake lines, custom colours, or special builds) can’t be cancelled or refunded once production begins.
If you’re unsure whether your item is custom, please contact us before ordering.
Most products include a 12-month manufacturer warranty, and we’ll always help guide you through the process if something goes wrong.
For full details, please see our Returns Policy.
- EASY RETURNS
- UK CUSTOMER SERVICE
- Over 10 Years Experience