| Material |
ECO: Epichlorohydrin
|
EPDM: Ethylene Propylene
|
FFKM: Fully-fluorinated FKM
|
|
Description
|
Good low temperature flexibility and gas permeability with high resistance to oils, fuels and common solvents; good weatherability.
|
Excellent weather and ozone resistance. High tensile strength. Good low temperature properties. Resistant to non-flammable hydraulic fluids (Skydrol) but poor resistance to mineral oils.
|
Tough! Temperature performance beyond most elastomers, highly resistant to a wide range of solvents and chemicals, low permeation and outgassing
|
|
Hardness: Shore A (Hint)
|
35-90
|
40 - 90
|
40 - 90
|
|
Tensile Strength (1000psi)
|
2 - 3
|
0.5 - 3.5
|
3
|
|
Tear Resistance
|
Good
|
Fair
|
Good
|
|
Impact Resistance
|
Good
|
Good
|
Excellent
|
|
Compression Set (Method B, %)
|
20
|
20 - 60
|
<20
|
|
Electrical Resistance (ohms/cm2)
|
1*1012 - 1*1013
|
2*1016
|
1*1012
|
|
Low Temperature (°C)
|
-50
|
-45
|
-15
|
|
High Temperature (°C)
|
140
|
130
|
275
|
|
Intermittent High (°C)
|
150
|
150
|
315
|
|
Ozone (protected)
|
Excellent
|
Excellent
|
Excellent
|
|
Weather and Sunlight
|
Excellent
|
Excellent
|
Excellent
|
|
Gas Permeation
|
Fair
|
Good
|
Excellent
|
|
Water
|
Good
|
Excellent
|
Excellent
|
|
Acid/Base - dilute
|
Good
|
Excellent
|
Excellent
|
|
Acid/Base - concentrated
|
Fair
|
Fair
|
Excellent
|
|
Solvent - Aliphatic
|
Excellent
|
Poor
|
Excellent
|
|
Solvent - Aromatic
|
Good
|
Poor
|
Excellent
|
|
Oils and Gasoline
|
Excellent
|
Poor
|
Excellent
|
