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DARPack is a line of premium, high temperature gasket sheet, made from synthetic fibers and an elastomeric binder. For more details on each style, review the chart below. 

Compressed

 Non-Asbestos Sheet

DARPak Style

Green White Blue Carbon W.I. Black

Binder 

NBR SBR NBR NBR NBR

Density (lb/cubic ft)

112

112

112

105

112

Maximum Service Temperature 

750 750 750 850 750
Maximum Service Pressure (psi) 1400 psi 1400 psi 1400 psi 1450 psi 1475 psi
Compressibility @ 5000 psi (%) 7-15% 7-17% 7-15% 7-17% 7-17%
Recovery Minimum (%) 50% 50% 50% 60% 50%
Creep Relaxation ASTM F38B (max%) 20% 20% 20% 19% 20%
Tensile Strength - ASTM F152 (against the grain) 2800 2800 2800 2390 5000
Thickness Increase (max%) ASTM F146 (ASTM Oil #3)  0-8% 25-30% 0-8% 0-5% 0-7%
Weight Increase (max%) ASTM F146 (ASTM Oil Fuel B)  10% 25% 10% 15% 15%
Thickness Increase (max%) ASTM F146 (ASTM Oil Fuel B)  0-7% 15-25% 0-7% 0-5% 0-5%
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