CoolrunnerKK is an Extra Heavy Duty +25,000-lb axle-rated material. CRKK offers enhanced friction performance for maximum stopping power and superior lining & drum wear rates across all temperature ranges.

ProTec uses a new generation of resilient synthetic graphites which support high friction levels without diminishing the life of the drum and lining. Our proprietary compression molding process forces a violent resin immersion, creating a stronger fiber matrix which is nearly impervious to heat.

As a result of the formation of a durable, low density, resin-fiber bond, CRKK achieves thermal load–sharing levels, surpassing that of any truck brake friction on the market today.

All linings are produced according to ISO-9001/V2008

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CRKK Specifications

Friction Average SAE-J661A
Normal (to 450 F) 0.49
Hot (450-650 F) 0.46

GAWR: 25,000 Lbs @ 165 AL, 29,000 Lbs @ 210 AL

Temperature Range: 800 degrees F

Drum Use Ratio: Positive

Stopping Power: Superior

Resistance to Fade: Excellent

Hot Stop Effectiveness: Excellent

Cold Stop Effectiveness: Excellent

Recovery: Excellent

Swell and Growth SAE-J160 Max: 0.007”-0.009”

The above test data is provided for informational purposes and represents standards in controlled laboratory settings. Actual performance will vary by application and operating conditions.