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Technical Information

Properties of Rubber

Key

E = Excellent   G = Good   F = Fair   P = Poor


 Natural Rubber SBR Butyl Butadiene EPDM Nitrile Silicone Viton
Specific Gravity 0.92 0.94 0.92 0.91 0.86 0.98 0.98
1.60		 1.85
Hardness Range
(Shore A)		 30-100 35-100 30-90 45-80 30-90 30-100 25-90 55-95
Tensile Strength
Max (psi @ Rm. Tep.)		 5000 3000 2500 2500 3000 3000 1500 3000
Elongation
Max (% @ Rm. Temp.)		 750 600 700 500 600 600 800 450
Resilience E G P-F E G F-G F-G F
Compression Set G G P-F F G G G-E G-E
Impermeability to Gases F F E F F G P-F G-E
Flex Cracking Resistance F G G E G F F-E G
Tear Strength E F G G F-G F-G P-F F
Abrasion Resistance E G-E G E G-E G-E P-F F-G
Impact Strength E E G G G F-G P-G F
Cut Growth Resistance E G E F-G G G P-F P
Oxidation Resistance F-G F-G E F-G G-E F-G E e
Ozone Resistance P P G-E P E P E E
Weathering Resistance F F E F E F-G E E
Sunlight Resistance P-F F E F E P-F E E
Water Resistance E G-E GEE E E G-E G G-E
Flame Retardance P P P P P P F-G G-E
Heat Resistance F F-G G P-F G-E G E E
Low Temp Flexibility G-E G F-G G-E G-E F-G E F-G
Oil and Gasoline P P P P P G-E P-F E
Animal & Vegetable Oils F F G-E F G G-E F-G E
Alchohols G G G G F-G F-G G F-E
Alkalies F F E F G-E G-E P F-G
Acids F-G F-G G-E F-G G G F G
Aliphatic Hydrocarbon Solvents P P P P P E P-F E
Aromatic Hydrocarbon Solvents P P P P P F-G P-F E
Oxygenated Solvents G G G-E G G-E P F P

^ Table data originally published in an article titled Engineering Properties of Elastomers, published in the May 28, 1981 issue of the PLANT ENGINEERING magazine