There is perhaps no single vehicle safety system more important in racing than brakes, and no single part of that system is more critical than brake fluid. At Competition Motorsport, we got tired (and a little nervous) of using "racing" brake fluid on the track that didn't live up to its claimed performance when things heated up.
CMS’s RF1 racing brake fluid has the highest DOT4 dry boiling point on the market while saving racers money compared to our nearest competitor, and with our 6- and 12-bottle discounts the savings grow even more! Don’t think you’ll use an entire case this season? Split a case with a friend and you’ll each save $2 per 500ml bottle! Our RF1 was manufactured in partnership with the brake fluid supplier for many Formula 1, WEC and other professional racing teams and it performs as such. RF1 Racing Brake Fluid is formulated to maintain consistent viscosity, lubricity, and compressibility at the extreme temperatures and line pressures found in racing, track days, and spirited driving.
Let's “boil it down.” Dry boiling point is calculated using fresh brake fluid (i.e. from an unopened bottle). Wet boiling point is calculated based on the brake fluid being saturated with water, which occurs naturally over time; this occurs by water vapor penetrating your flexible brake lines. If you’re racing or doing track days and only changing your brake fluid every 3 months you’re asking for trouble. The dry boiling point is the most important measure for racers and HPDE / track-day participants as long as you keep your brake fluid fresh. At Competition Motorsport we strongly suggest replacing your brake fluid before every track event, but at least every 3 months if you're consistently racing, driving at track days or otherwise going for "spirited" drives in your sports car.
CMS’s RF1 Fully Synthetic Racing Brake Fluid is formulated to provide the highest, most reliable performance under racing conditions, where braking systems operate at very high temperatures. RF1 exceeds all DOT 3 & 4 requirements and is compatible with all DOT 3, 4, and 5.1 fluids.
CMS RF1 is not compatible with DOT5 or mineral-based brake fluids.