Elastomeric Properties 3

Comparative Properties of Typical Commercial Elastomers
CHEMICAL NAME
Polyacrylate
Fluoroalkyl Polysiloxane
Polysiloxane
Fluorinated Hydrocarbon
Fluoroelastomer
Perfluoroelastomer
COMMON NAME
Acrylic
Fluorosilicone
Silicone
Flurocarbon
Material Designation
(ASTM D 2000, SAE J 200 Classification)
Not Assigned
FK
GE
HK
HK
FFKM
Tensile Strength, Mpa
(psi)
Pure Gum
Below 10.3 (1,500)
Below 10.3 (1,500)
8.3 (1,200)
Over 12.4 (1,800)
Not Applicable
Black Loaded Stocks
Over 17.2 (2,500)
Over 10.3 (1,500)
Over 10.3 (1,500)
3.4 (500) – 20.7 (3,000)
Over 13.8 (2,000)
Over 13.8 (2,000)
Hardness Range
(Durom, A)
40-95A
60-90
40-85
60-90
55-95
65-95A
Specific Gravity
(Base Material)
1.08-1.12
1.30-2.20
1.14-2.05
1.80
1.85
2.01
Adhesion to Metals
Very Good to Excellent
Excellent
Excellent
Fair to Good
Fair to Good
Fair
Adhesion to Fabrics
Good
Excellent
Excellent
Good
Good to Excellent
Good
Tear Resistance
Good
Poor to Fair
Poor
Fair to Good
Fair
Fair
Abrasion Resistance
Good
Poor
Poor
Good
Good
Good
Compression Set
Good
Good
Fair
Very Good
Fair to Good (Except at High Temp)
Fair
Rebound
Cold
Poor
Excellent
Excellent
Fair
Fair to Good
Not Available
Hot
Fair
Excellent
Excellent
Good
Good (Except at High Temp)
Not Available
Dielectric Strength
Good
Good
Good
Very Good
Good
Excellent
Electrical Insulation
Fair to Good
Excellent
Excellent
Good
Fair to Good
Excellent
Permeability to Gases
Very Low
Fairly Low
Fairly Low
Very Low
Very Low
Fair
Acid Resistance
Diluted
Good
Excellent
Excellent
Good to Excellent
Excellent
Excellent
Concentrated
Poor
Fair
Fair
Excellent
Excellent
Excellent
Solvent Resistance
Aliphatic Hydrocarbons
Good
Excellent
Poor
Excellent
Excellent
Excellent
Aromatic Hydrocarbons
Fair
Excellent
Poor
Excellent
Excellent
Excellent
Oxygenated (Keytones, etc.)
Poor
Poor
Fair
Poor
Poor
Excellent
Laquer Solvents
Poor
Poor
Poor
Poor to Fair
Poor to Fair
Excellent
Resistance to
Swelling in Lubricating Oil
Good
Excellent
Fair
Excellent
Excellent
Excellent
Oil & Gasoline
Good
Excellent
Fair
Excellent
Excellent
Excellent
Animal & Vegetable Oils
Good
Excellent
Good to Excellent
Excellent
Excellent
Excellent
Water Absorption
Very Good up to 100°C (212°F)
Excellent
Excellent
Very Good
Very Good
Very Good
Oxidation
Outstanding
Excellent
Excellent
Outstanding
Outstanding
Outstanding
Ozone
Outstanding
Excellent
Excellent
Outstanding
Outstanding
Outstanding
Sunlight Aging
Outstanding
Excellent
Excellent
Outstanding
Outstanding
Outstanding
Heat Aging
(Upper Limit Cont. Service)
165°C (329°F)
235°C (455°F)
205°C (401°F)
290°C (554°F)
Flame
Poor
Excellent
Fair to Good
Excellent
Excellent
Excellent
Heat
Excellent
Outstanding
Outstanding
Outstanding
Outstanding
Very Outstanding
Cold
Good
Outstanding
Outstanding
Fair to Good
Good
Good

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