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Best Brake Fluid for Endurance Racing - 2025 Guide
Endurance racing demands more from your brake fluid than almost any other motorsport discipline. Events like the 6, 12, and 24 Hours of endurance formats require stability over long stints, resistance to moisture absorption, and consistent pedal feel under varied conditions. This guide highlights top brake fluids from our Racing Brake Fluid Buyer’s Guide that excel in long-distance competition.
Why Wet Boiling Point Matters
In endurance events, your brake fluid isn’t just fighting heat, it’s also fighting moisture absorption over time. The wet boiling point measures performance after the fluid has absorbed water (up to 3.7% by volume). A high wet boiling point ensures your brakes stay firm even deep into an event.
Top Picks for Endurance Racing
1. Castrol SRF Racing Brake Fluid
- Dry Boiling Point: ~310–312°C (590–594°F)
- Wet Boiling Point: ~270°C (518°F) - industry-leading
- DOT 4 Racing
- Best For: Longest intervals between flushes, multi-day events, and professional endurance racing.
Read our Castrol SRF vs. Orthene Halo P1 comparison to see how it stacks up against more affordable options.
2. Brembo HTC64
- Dry Boiling Point: 335°C (635°F)
- Wet Boiling Point: 203°C (397°F)
- DOT 4 Racing
- Best For: Extreme competition with high peak temps; ideal for teams with mid-interval servicing.
3. Endless RF-650
- Dry Boiling Point: ~328°C (622°F)
- Wet Boiling Point: ~218°C (424°F)
- DOT 4 Racing
- Best For: Professional teams looking for consistent pedal feel and high-temperature stability.
4. ATE Type 200
- Dry Boiling Point: 280°C (536°F)
- Wet Boiling Point: 198–200°C (388–392°F)
- DOT 4
- Best For: Budget-conscious endurance teams that still need strong wet boiling performance.
5. Motul RBF 660
- Dry Boiling Point: 328°C (622°F)
- Wet Boiling Point: 204°C (399°F)
- DOT 4 Racing
- Best For: Teams balancing high dry performance with strong endurance capability.
6. AP Racing AP600 (Radi-CAL™ R2)
- Dry Boiling Point: 312°C (594°F)
- Wet Boiling Point: 195°C (383–395°F)
- DOT 4 Racing
- Best For: Teams needing strong wet performance and consistent pedal feel over long stints.
7. VP Racing Fuels 622
- Dry Boiling Point: 328°C (622°F)
- Wet Boiling Point: 204°C (399°F)
- DOT 4 Racing
- Best For: Endurance-track crossover where high peak temps are routine.
8. Pagid Racing Brake Fluid
- Dry Boiling Point: 330°C (626°F)
- Wet Boiling Point: 200°C (392°F)
- DOT 4 Racing
- Best For: Long-distance competition with frequent heavy braking zones.
Maintenance for Endurance Racing
- Always start with fresh, unopened brake fluid before an event.
- Minimize fluid exposure to humidity during servicing.
- For multi-day events, monitor pedal feel and fluid temperature, and top up if necessary.