Products Industrial Medical Automobiles   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 GP100OC 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 85oC 100oC 125oC 135oC 110oC 150oC 210oC 255oC 75oC 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

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