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Silicone is a semi-organic elastomer with outstanding resistance to extremes of temperature. It also has good resistance to compression set. However, low physical strength and abrasion resistance combined with high friction limit silicone to static seals.

Silicone is suitable for dynamic and static seal of o-rings in the environment containing the following chemicals: Acetaldehyde, Glacial Acetic Acid, Air below 200 C, Aluminium Sulfate, Cold Gas Ammonia, Hot Gas Ammonia, Concentrated Ammonium Hydroxide, Ammonium Sulfate, ASTM Oil One, Automotive Brake Fluid, Beer, Boric Acid, Calcium Chloride, Calcium Hydroxide, Carbon Monoxide, Carbonic Acid, Castor Oil, Chromic Acid, Citric Acid, Coffee, Corn Oil, Denatured Alcohol, Dow Guard, Dowtherm A, Ethyl Diamine, Ethylene Glycol, Gelatine, Glucose, Glycerin, General Glycol, Helium, Isobutyl Alcohol, Isopropanol, Linsed Oil, Lye, Mercuric Chloride, Mercury, Methanol, Methyl Alcohol, Methyl Ether, MIL-H-7083, Milk, Gas Nitrogen, Cold Oxygen, Ozone, Peanut Oil, Potassium Nitrate, Potassium Sulfate, Propanol, Propyl Alcohol, 90E 65E 50E 30E Pydraul, Sea Water, Silver Nitrate, Sodium Bicarbonate, Sodium Carbonate, Sodium Chloride, Soyabean Oil, Sucrose Solutions, Tartaric Acid, Vinegar, Whiskey.

O-Ring material Silicone is usually suitable for static seal in the environment containing Aluminium Chloride, Aluminium Flouride, Aluminium Nitrate, Ammonium Phosphate, Aniline, Arachlor 1248, Argon, ASTM Oil Three, Bleach Liquor, Borax Solutions, Butter, Butyl Alcohol, Calcium Hypochlorite, Calcium Nitrate, Calcium Sulfide, Carbitol 2, Chrome Plating Solution, Cod Liver Oil, Dibutyl Phthalate, Diethylamine, Diethylamine Glycol, Elco 28 Lubricant, Ethanol, Ethyl Alcohol, Ethyl Hexanol, Hexyl Alcohol, Animal Fat Lard, Linoleic Acid, Mineral Oils, Neatsfoot Oil, N-Hexaldehyde, Octyl Alcohol, Oxalic Acid, Producer Gas, Radiation, Stearic Acid, Dry Sulfur Dioxide Gas, Wet Sulfur Dioxide Gas, Liquefied Under Pressure Sulfur Dioxide, Sulfur Hexafluoride, Sulfur Trioxide, Tannic Acid, Tertiary Butyl Alcohol, Type A Transmission Fluid, Fresh Water.

O-Ring material Silicone is sometimes ok for static seal but not for dynamic seal in the environment containing chemicals such as Acetamide, Acetic Anhydride, Acetyl Chloride, Acetylene Gas, Anhydrous Ammonia, Ammonium Carbonate, Ammonium Chloride, Ammonium Nitrate, Chlorine Dioxide, Dimethyl Formamide, Dow Corning 550, Ethyl Acetoacetate, Ethyl Cellulose, Ethyl Mercaptan, Petroleum Base Hydraulic Oil, Hydrogen Gas, Iodine, Hydraulic Fluid (Phosphate Ester Type) Lindol, MIL-S-81087, Silicone Grease, Skydrol 500, Sulfur Chloride, Wagner 21B Brake Fluid.

Silicone is not suitable for o-rings exposed in the environment containing chemicals such as Acetone, Acetophenone, Acrylonitrile, Alkazene, Aluminium Acetate, Ammonium Persulfate Solution, Amyl Acetate, Amyl Alcohol, Amyl Borate, Amyl Chloronaphthalene, Aniline Oil, Aromatic Fuel 50%, Askarel Transformer Oil, ASTM Fuel A, ASTM Fuel B, ASTM Fuel C, ASTM Fuel D, ASTM Oil Four, Automatic Transmission Fluid, Benzaldehyde, Benzene, Benzene Sulfonic Acid, Benzine (Ligroin), Benzophenone, Benzyl Chloride, Bromine Gas, Bromobenzene, Butadiene Monomer, Butane, Butyl Carbitol, Butyl Cellosolve, Butyraldehyde, Carbolic Acid (Phenol), Carbon Disulfide, Carbon Tetrachloride, Cellosolve, Tung Oil China Wood Oil, Chlordane, Chlorinated Solvents, Chlorine Trifluoride, Dry Chlorine, Wet Chlorine, Chloroform, Chlorosulfonic Acid, Coolanol Monsanto, Coal Tar Creosote, Crude Oil (Asphalt Base), Cyclohexane, Diacetone, Dichloro-Butane, Diesel Oil, Di-ester Lubricant MIL-L-7808, Dioxane, Diphenyl, Ethane, Ethyl Benzene, Ethyl Benzoate, Ethyl Chloride, Ethyl Chlorocarbonate, Ethyl Ether, Ethyl Oxalate, Ethyl Pentachlorobenzene, Ethylene Dichloride, Ethylene Oxide, Ethylene Trichloride, Freon 11 (M), Freon 112, Freon 113, Freon 114, Freon 114B2, Freon 13, Freon 21, Freon 22, Freon TF, Fuel Oil, Furan, Furfuryl Alcohol, Automotive Gasoline, Petroleum Base Grease, Heptane, Hexane, Gas Hydrobromic Acid, Hydrogen Peroxide, Iso Octane, Isopropyl Acetate, Isopropyl Chloride, Isopropyl Ether, JP 3 MIL-J5624, JP 4 MIL-J5624, JP 5 MIL-J5624, JP 6 MIL-J5624, Kerosene, Lacquer Solvents, Lacquers, Liquefied Petroleum Gas (LPG), Malathion, Maleic Acid, Methyl Acetate, Methyl Acrylate, Methyl Butyl Ketone, Methyl Cellosolve, Methyl Chloride, Methyl Ethyl Ketone (MEK), Methyl Isobutyl Ketone (MIBK), Methyl Methacrylate, Methylene Chloride, MIL-F-25558 (RJ-1), MIL-F-25656, MIL-G-25760, MIL-H-5606, JP-5 JP-4 JP-3 MIL-J 5624, MIL-L-25681, MIL-R-25576 (RP-1), Type 1 Fuel MIL-S-3136, Monovinyl Acetate, Naphtha, Naphthalene, Naphthalenic, Nitrobenzene, Nitroethane, Nitrogen Tetroxide, Nitromethane, Nitropropane, N-Octane, N-Pentane, Oleic Acid, Oleum (Fuming Sulfuric Acid), Oronite 8200, Petroleum Oil, Phenol, Phosphoric Acid, Pine Oil, Propane, Propyl Acetate, Propylene, Propylene Oxide, 10E Pydraul, 540C 312F 230C Pydraul, Transformer Oil Pyranol, 55 (Phosphate Ester) 53 43 Pyrogard 42, Rapeseed Oil, Red Oil, RJ-1 (MIL-F-25558), RP-1 (MIL-R-25576), Silicone Oils, Steam to 350F, Stoddard Solvent, Styrene Monomer, Sulfurous Acid, Tertiary Butyl Mercaptan, Tetrabromoethane, Tetrachloroethane, Tetrahydrofuran, Tetralin, Toluene, Triethanolamine, Turbine Oil, Turpentine, Varnish, White Pine Tar, Xylene.