Motul RBF 660 Racing DOT 4 Brake Fluid 500ml Fully Synthetic 101666
SKU: 65701419656

Motul RBF 660 Racing DOT 4 Brake Fluid 500ml Fully Synthetic 101666

Sale price$22.50 Regular price$25.00
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Description

Motul RBF 660 Racing DOT 4 Brake Fluid 500ml Fully Synthetic 101666100% Synthetic Racing Brake Fluid DOT 4Very high boiling point: 325C 617FFor hydraulic actuated brake and clutch systemsTYPE OF USEFor all types of hydraulically actuated brake and clutch systems requiring non silicone synthetic fluid. Specially designed to withstand the extreme temperature generated by racing carbon and ceramic brakes while allowingminimized air entrance for brake cooling. Also suitable for conventional brakes with steel discs and

100% Synthetic Racing Brake Fluid – DOT 4
Very high boiling point: 325°C / 617°F
For hydraulic actuated brake and clutch systems
TYPE OF USE
For all types of hydraulically actuated brake and clutch systems requiring non-silicone synthetic fluid.
Specially designed to withstand the extreme temperature generated by racing carbon and ceramic brakes while allowing
minimized air entrance for brake cooling.
Also suitable for conventional brakes with steel discs and for conventional hydraulic clutch actuators.
Exceeds DOT 3 and DOT 5.1 standards requirements, except for viscosity at -40°C / -40°F.
PERFORMANCES
STANDARDS FMVSS 116 DOT 4
SAE J1703 / J1704
Extreme thermal resistance and stability:
MOTUL RBF 660 FACTORY LINE very high dry boiling point (325°C / 617°F) exceeds the requirements of the standards DOT 5.1 non silicone base (260°C mini / 500°F mini) and DOT 4 (230°C mini / 446°F mini), and therefore enables effective braking even in extreme conditions.
Allows better aerodynamic performance by reducing the need for brake cooling air scoops on vehicles.
Efficient when rainy:
MOTUL RBF 660 FACTORY LINE very high wet boiling point (205°C / 401°F) is superior than the requirements of the
standards DOT 5.1 non-silicone base (180°C mini / 356°F mini) and DOT 4 (155°C mini / 311°F mini), and therefore
enables to keep efficient braking in wet conditions.
Indeed, DOT 3, DOT 4 or DOT 5.1 brake fluids have the property of absorbing moisture from the air, which reduces their boiling points and increases the risk of “vapor lock” phenomena.
The wet boiling point is measured after moistening the product with 3% water in order to be representative of the state of the fluid after 1 year of use.
RECOMMENDATIONS
Drain interval: always according to manufacturers’ recommendations and to be tuned to your own use.
Avoid mixing with lower performance polyglycol-based brake fluids.
Do not mix with silicone (DOT 5 silicone base) or mineral base fluids (LHM).
Store brake fluid in its original container, tightly closed to prevent moisture absorption.
Aggressive chemical product if in contact with hands, paint or varnish.
If skin contact, rinse thoroughly with water.
PROPERTIES
Color Visual Amber
Viscosity at 100°C (212°F) 2.6 mm²/s
Viscosity at -40°C (-40°F) 1,698.0 mm²/s
Dry boiling point 325.0 °C / 617.0 °F
Wet boiling point 205.0 °C / 401.0 °F

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 65701419656

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Kevin Crosby
Pawtucket, US
★★★★★ 5
Natural soap
Size: 3.5 Ounce (Pack of 3)
Smaller than expected. Lathers well and smells great. Rinses off easily.
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Reviewed in the United States on June 1, 2026
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Melissa
Phoenix, US
★★★★★ 5
Yummmm
Size: 3.5 Ounce (Pack of 6)
These smell absolutely amazing and leave my skin feeling great. They don't run out super fast and was a great gift for my husband
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Reviewed in the United States on April 26, 2026
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Ruiz
Grantham, US
★★★★★ 5
A Noticeable Upgrade from Regular Soaps
Size: 3.5 Ounce (Pack of 6)
Leaves skin soft, smooth, and refreshed without dryness I’ve tried plenty of big retail soaps over the years, but this one stands out right away. The bar lathers nicely and leaves my skin feeling noticeably smoother and never dry, which is a huge improvement compared to what I used before. The scent is clean and subtle, not overpowering, so it works well for everyday use. I did expect the bar to be a little bigger, but it has held up better than I thought it would, making it worth the price—especially since I picked it up during a sale. Overall, this is a quality soap that feels more refined than the usual options, and I’ll definitely keep it in my rotation.
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Reviewed in the United States on September 7, 2025
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steve
Omaha, US
★★★★★ 5
Soap
Size: 3.5 Ounce (Pack of 6)
My son and I really enjoy this soap. Not an overpowering smell and it lasts a decent amount of time...unlike other soaps
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Reviewed in the United States on May 8, 2026
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violetflame
Boise, US
★★★★★ 4
Works well
Size: 3.5 Ounce (Pack of 6)
I just wanted to update my review as I have had more time to review the product. The presentation is well done and in a nice looking box. Initially it did not smell the best in the box but when it gets wet it has a mild smell that is pleasant. It has a great lather, the exfoliating beads feel good, and it does work well. Great product but the smell is mild.
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Reviewed in the United States on December 26, 2023

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