ASTM Designation
(ASTM D1418)

EP

CR

NBR

NR

IIR

VMQ

FVMQ

FKM

Tensile Strength
(psi)

>2000

>2000

>2000

>2000

>2000

>1200

>1200

>1400

Hardness Range
(Durometer A)

40-90

20-80

50-95

50-70

40-75

40-80

40-70

70-90

Tear Resistance

G

G

F

G

G

F

P

F

Abrasion Resistance

G to E

VG

G

E

G

P

F

G

Compression Set

G

G

G

E

F

VG

E

E

Resilience Cold

G

G

G

G

P

E

G

F

Resilience Hot

VG

VG

G

F

VG

E

E

E

Radiation Resistance

O

G

P

F to G

G

G

E

E

Impermeability to Gases

G

G

G

F

O

F

E

P

Acid Resistance

Mild Dilute

E

E

F to G

F to P

E

E

E

O

Strong Concentrate

G

G

F to G

P

G

F

G

E

Solvent Resistance

Aliphatic Hydrocarbons

P

F to G

E

P

P

P

G

E

Aromatic Hydrocarbons

P

P

P

P

P

P

E

E

Oxygenated (Ketones, etc)

G

P

P

P

G

P

F

F

Resistance To:

Swelling in Lubricating Oil

P

G

VG

P

P

P

E

O

Oil and Gasoline

P

G

E

P

P

F

G

E

Animal Oils

F

F

E

P

F

G

E

E

Water Absorption

VG

G

VG

VG

VG

E

E

E

Oxidation

E

VG

G

F to P

E

E

O

G

Ozone

O

VG

F

F to P

F to G

E

O

E

Sunlight Aging

O

VG

P

F to P

VG

E

E

G

Heat Aging

VG

G

G

G to F

G

O

E

E

Low Temperature

VG

G

F to G

G

G

O

G

F

Flame

P

G

P

P

P

F

E

E

Vegetable Oils

F

G

G

P

F

P

E

E

Chlorinated
Hydrocarbons

P

P

F

P

P

P to F

F

G

Nitrile or
NBE or
Buna-N

Ethylene
Propylene