POLYMER COMPARISON CHART

Properties

Natural
N.R.

Nitrile
N.B.R.

Neoprene
C.R.

Hypalon
C.S.P

Butyl

EPDM

Silicone

MVQ

FPM

AU.EU

Hardness Range
(Durometer A)

30-90

20-95

30-95

40-95

35-85

40-90

25-85

55-95

60-90

Tensile Strength (PSI)

3000

3500

3000

2500

2000

3000

1100

1800

4000

Specific Gravity
(Base Material)

0.93

1.00

1.23

1.12-
1.20

0.92

0.86

0.98

1.85

1.06

Vulcanizing Properties

E

E

E

E

F

E

E

G

E

Adhesion to metals

E

E

E

E

F

E

F

G

E

Adhesion to Fabrics

E

E

E

G

F

G

F

E

E

Tear Resistance

G

F

G

F

G

G

P

F

E

Abrasion Resistance

E

E

E

E

G

E

P

G

O

Compression Set

G

G

G

F

F

G

G

G

F

Electrical Insulation

G

P

G

G

E

E

E

G

G

Permeability to Gases

F

F

P

P

P

F

G

P

F

Acid Resistance Dilute 

G

G

E

E

E

E

G

E

F

Acid Resistance
Concentrated

G

G

G

G

G

E

P

E

P

Solvent Resistance

Aliphatic Hydrocarbons

P

E

G

G

P

P

F

E

E

Aromatic Hydrocarbons

P

G

G

F

P

P

F

E

F

Oxygenated
(Ketones etc)

G

P

F

P

F

G

F

P

P

Lacquer Solvents

P

F

P

P

F

P

P

P

Resistance To

Swelling in Lubricating oil 

P

G

G

E

P

P

F

E

E

Oil & Gasoline

P

G

G

G

P

P

F

E

E

Animal & Vegetable Oil

P

G

G

G

G

G

F

E

E

Water Absorption

G

E

G

G

E

G

E

G

GP100^OC

Oxidation

G

F

E

E

F

E

E

O

E

Ozone

F

P

E

O

F

O

E

O

E

Sunlight Ageing

P

P

G

O

F

O

G

O

G

Heat Ageing 

Cont. Service

85^oC

100^oC

125^oC

135^oC

110^oC

150^oC

210^oC

255^oC

75^oC

Flame

P

G

G

G

P

P

F

E

F

Heat

G

P

G

E

G

E

E

O

G

Cold

E

F

F

G

G

E

E

G

E

* * * * * *
G - GOOD
P - POOR
E - EXCELLENT
F - FAIR
O - OUTSTANDING