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Home > Custom Gasket > Physical Properties
Physical Properties of Common Gasketing Materials
O = Outstanding, E = Excellent, G = Good, F = Fair, P = Poor
Physical Properties
Mechanical Resistances
Temp. Characteristics

Material

Resilience

Drift at Room Temp

Compression Set

Electrical Resistivity

Gas Impermeabitily

Impact Resistance

Abrasion Resistance

Tear Resistance

Cut Growth Resistance

Drift @ 212

Heat Aging @ 212

Flame Resistance

Natural
O
E
G
E
G
E
E
E
E
G
G
P
Synthetic Natural
O
G
F
E
G
E
E
G
E
G
F
P
SBR
G
E
G
E
F
E
E
F
G
G
G
P
Butyl
F
F
F
E
O
G
G
G
E
F
E
P
Polybutadiene
O
G
F
E
G
G
E
G
F
G
F
P
EPDM
G
F
F
E
G
G
G
P
G
F
E
P
Neoprene
E
F/G
F/G
F
G
G
G/E
G
G
F/G
G
G
NBR
G
G
G
P
G
F
E
G
G
E
G
P/F
Polysulfide
F
P
P/F
F
E
P
P/F
P/F
P
P
G
P
Polyurethane
G/E
G/E
E
G
G
E
E
E
F/E
E
F/G
P/F
Silicone
P/E
F/E
G/E
E
F
P/F
P/G
P/G
P/G
E
E
F/G
Hypalon
G
F
F/G
G
E
F/G
G
F/G
F/G
F
E
G
Acrylics
G
F
F/G
F
G
P
F/G
F
G
F
E
P/F
Fluoroelastomers
F
G
G/E
G
E
P/G
G
P/G
P/G
G/E
O
E

Rubber Type
Comparative Cost Index
Weight of Base Elastomer
Physical Properties
Durometer Range
Tensile-Strenght (PSI)
Elongation (%)
Low Temperature Properties (ºF)

LB/cu. In.

Specific Gravity

Reinforced

@ 250 º

@ 400 º

Reinforced

@ 250 º

@ 400 º

Stiffening

Brittle Point

Natural

100

0.033

0.91

30/100

>4000

1800

125

500

500

80

-20 to -50

-70

Synthetic Natural

100

0.033

0.91

40/80

2000 to 3000

1800

125

300 to 700

500

80

-20 to -50

-70

SBR

90

0.034

0.94

40/100

>2000

1200

170

450

250

60

0 to -50

-80

Butyl

110

0.033

0.92

30/100

>2000

1000

350

300 to 800

250

80

-10 to -40

-50

Polybutadiene

95

0.034

0.94

45/80

2500

1200

170

450

250

60

-30 to -60

-100

EPDM

95

0.031

0.86

30/90

2000 to 3000

2000

400

500

300 to 500

0 to 120

-20 to -50

-90

Neoprene

140

0.044

1.23

40/95

>3000

1500

180

650 to 850

350

0 to 100

+10 to -20

-40

NBR

160

0.036

1.0

20/90

1000 to 3500

700

130

400 to 600

120

20

+30 to -20

-65

Polysulfide

220

0.048

1.34

20/80

500 to 1500

700

<25

200 to 550

140

<25

-10 to -45

-60

Polyurethane

410

0.039

1.05

55/100

4000 to 8000

1800

200

250 to 800

300

140

-10 to -30

-60

Silicone

1100

0.036

0.95

25/80

600 to 1500

850

400

90 to 800

350

200

-60 to -160

-90/-180

Hypalon

160

0.040

1.10

50/95

1500 to 2500

500

200

250 to 500

60

20

-30/-50

-50

Acrylics

340

0.040

1.10

40/90

1700

1300

225

450

400

150

+35 to +10

-10

Fluoroelastomers

4100

0.05/0.07

1.4/1.95

65/90

1500 to 3000

300 to 800

150 to 300

100 to 450

100 to 350

50 to 160

+20 to -30

+10/-60


*Comparative Cost Index with natural Rubber as Base (100%)
 
 
 
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