Durlon® 8500

A high-performance compressed gasket material for use in process industries including pulp & paper, food & beverage, pharmaceutical, hydrocarbon, chemical, refinery, and general industry. Durlon® 8500 is suitable for oils, water, steam, new generation refrigerants, dilute acids and alkalis, and many other liquids and gases. Passed API 6FB Fire Test and conforms to FDA in 21 CFR 177.2600

BENEFIT: Durlon® 8500 has a strong dielectric rating, making it ideal for isolation kit applications where compressed fiber sheet gaskets can be utilized.


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Our workhorse material, Durlon® 8500 is excellent in steam, natural gas, soybean processing and with new generation refrigerants. A high quality general service gasket material for use in a wide range of services in pulp and paper, food, beverage, pharmaceutical, chemical, refinery, gas pipeline and general industry. Durlon® 8500 exhibits good compressibility and recovery, excellent sealability, flexibility and cutting characteristics.
Durlon® 8500 contains high-strength aramid and inorganic fibers bonded with high-grade Nitrile (NBR) rubber. Durlon® 8500 conforms to FDA in 21 CFR 177.2600
Color Green
Fiber System Aramid/Inorganic
Binder NBR
Temp. Min.
Temp. Max.
Continuous, Max
-73°C (-100°F)
371°C (700°F)
287°C (548°F)
Pressure, max, bar (psi) 103 (1,500)
Density, g/cc (lbs/ft3) 1.7 (106)
Compressibility, % 8-16
Recovery, % 50
Creep Relaxation, % 20
Tensile Strength, MPa (psi) 13.8 (2,000)
ASTM 2378 (Nitrogen)
0.03 cc/min
Fluid Resistance, ASTM F146 IRM 903 Oil 5hrs at 300°F
Thickness Increase, %
Weight Increase, %
Fluid Resistance, ASTM Fuel B 5hrs at 70°F
Thickness Increase, %
Weight Increase, %
Flexibility, ASTM F147 10x
Volume Resistivity, ohm-cm ASTM D257 4.2 x 1013
Dielectric Breakdown, ASTM D149, kV/mm (V/mil) 11.7 (297)

Note: ASTM properties based on 1/16″ sheet thickness except ASTM F38, which is based on 1/32″ sheet thickness. This is a general guide only and should not be the sole means of accepting or rejecting this material. The data listed here falls within the normal range of product properties but should not be used to establish specification limits nor used alone as the basis of design.

*For applications above Class 300, consult your representative.

California Proposition 65 Compliant
RoHS Reach Declaration Compliant
API 6FB Fire Test with avg. temp >650°C, 30 mins, 40 bar, 1 ml (inch/min.) max allowable leakage
FDA Conforms to the requirements of 21 CFR 177.2600
1/16” 1/8”
m 2.7 4.2
Y psi (MPa) 2,359 (16.3) 2,931 (20.2)
Gb psi (MPa) 650 (4.5) 400 (2.8)
a 0.33 0.35
Gs psi (MPa) 200 (1.4) 20 (0.1)