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GASKET MATERIAL REFERENCE

 

 

 

EPDM

Neoprene

Nitrile

Silicone

Chemical Name

Ethylene

Propylene

Chloroprene

Acrylonitrile

Butadiene

Polysiloxane

SAE – ASTM D-2000

BA, CA, DA

BC, BE

BF, BG, BK

FC, FE, GE

Classification

ASTM Designation (D-1418)

EPDM, EPR

CR

NBR

Psi, Pvsi, Si, Vsi

Physical Properties

Specific Gravity

0.86

1.23

1.00

0.95 to 1.20

Durometer, Range

30 – 90

40 - 95

30 - 90

25 - 90

Tensile Strength

Max (psi @ Rm. Temp.)

3,000

3,000

3,000

1,500

Elongation

Max (% @ Rm. Temp.)

600

600

600

800

Compression Set

G

F - G

G

G - E

Heat resistance

VG

F - G

G

E

Resilience or Rebound

G

VG

F - G

G

Impact Resistance

G

VG

F - G

F

Abrasion Resistance

G - E

G - E

G - E

P - F

Tear Resistance

F - G

F - G

F - G

P - F

Cut Growth

G

G

G

P - F

Flex Cracking Resistance

G

G

F

G - VG

Flame Resistance

P

G

P

F - G

Impermeability, Gas

F

F - G

G

P - F

Weathering Resistance

E

G

F - G

E

Oxidation Resistance

VG

VG

F - G

E

Ozone Resistance

E

G

P

E

Sunlight Resistance

E

VG

P - F

E

Low Temperature Flexibility

VG

F

F - G

E

Low Temperature Limit

-20oF to –60oF

-10oF to –50oF

-30oF to –40oF

-65oF to –150oF

High Temperature Limit

300oF to 350oF

225oF

275oF

400oF to 550oF

Chemical Resistance Properties

Acid

G

G

G

F

Alcohols

F - G

VG

F - G

G

Aliphatic Hydrocarbon

Solvents

P

G

E

P - F

Alkali

VG

E

VG

P

Animal & Vegetable Oils

G

G

VG

G

Aromatic Hydrocarbon

Solvents

P

P - F

F - G

P - F

Oil & Gasoline

P

F - G

VG

P - F

Oxygenated Solvents

VG

P - F

P

F

Water

E

G

VG

G

 

 

 

Key: E=Excellent; VG=Very Good; G=Good; F=Fair; P=Poor

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