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Polysulfide was one of the first commercial synthetic elastomers. It has excellent weather resistance to combinations of solvents. It is essential for applications involving combinations of ethers, ketones, and petroleum solvents used by the paint and insecticide industries. Polysulfide has limited high remperature capabilities. Its applications are further restricted by its poor mechanical strength and poor resistance to compression set.

Polysulfide is suitable for dynamic and static seal of o-rings in the environment containing the following chemicals: Acetone, Cold Gas Ammonia, Ammonium Chloride, Amyl Borate, ASTM Fuel A, ASTM Oil One, Benzine (Ligroin), Bunker Oil, Butane, Calcium Chloride, Calcium Nitrate, Carbonic Acid, Cyclohexane, Denatured Alcohol, Diesel Oil, Dow Corning 550, Ethane, Ethanol, Ethyl Alcohol, Ethyl Oxalate, Freon 11 (M), Freon 112, Freon 114, Freon 13, Freon 32, Freon C318, Freon TF, Fuel Oil, Automotive Gasoline, General Glycol, Petroleum Base Grease, Helium, Heptane, Hexane, Hexyl Alcohol, Petroleum Base Hydraulic Oil, Isopropanol, Isopropyl Ether, Lacquer Solvents, Lacquers, Liquefied Petroleum Gas (LPG), Mercury, Methyl Butyl Ketone, Methyl Ether, MIL-F-25558 (RJ-1), MIL-R-25576 (RP-1), Gas Nitrogen, N-Pentane, Oleic Acid, Potassium Nitrate, Propane, Propanol, Propyl Alcohol, Red Oil, RJ-1 (MIL-F-25558), RP-1 (MIL-R-25576), Silicone Grease, Silicone Oils, Tannic Acid, Tetrachloroethane, Tetrahydrofuran, Type A Transmission Fluid, Turbine Oil, Varnish.

O-Ring material Polysulfide is usually suitable for static seal in the environment containing Glacial Acetic Acid, Air below 200 C, Alkazene, Aluminium Nitrate, Ammonium Nitrate, Amyl Alcohol, Aniline Oil, ASTM Fuel B, ASTM Fuel C, Benzoic Acid, Benzophenone, Brake Fluid, Bromine Gas, Butyl Alcohol, Butyl Cellosolve, Carbitol 2, Cellosolve, Diacetone, Diacetone Alcohol, Dibenzyl Ether, Dibutyl Phthalate, Di-ester Lubricant MIL-L-7808, Diethylamine, Dimethyl Formamide, Dimethyl Phthalate, Diphenyl, Elco 28 Lubricant, Ethyl Benzoate, Ethyl Ether, Ethyl Hexanol, Ethyl Silicate, Formaldehyde, Freon 114B2, Furan, Glycerin, Isobutyl Alcohol, Isopropyl Acetate, JP 3 MIL-J5624, JP 4 MIL-J5624, JP 5 MIL-J5624, JP 6 MIL-J5624, Kerosene, Linsed Oil, Maleic Acid, Methane, Methyl Acetate, Methyl Acrylate, Methyl Ethyl Ketone (MEK), Methyl Isobutyl Ketone (MIBK), Methyl Mercaptan, Methyl Methacrylate, JP-5 JP-4 JP-3 MIL-J 5624, Milk, Mineral Oils, Naphtha, Naphthalenic, Natural Gas, N-Hexaldehyde, Octyl Alcohol, Ozone, Pine Oil, Potassium Sulfate, Propyl Acetate, Propylene, Silver Nitrate, Stearic Acid, Stoddard Solvent, Tertiary Butyl Alcohol, Turpentine, Vinegar, White Pine Tar, Xylene.

O-Ring material Polysulfide is sometimes ok for static seal but not for dynamic seal in the environment containing chemicals such as Acetic Anhydride, Acetylene Gas, Amyl Chloronaphthalene, ASTM Oil Four, ASTM Oil Three, ASTM Oil Two, Benzene, Bromobenzene, Butadiene Monomer, Butyraldehyde, Castor Oil, Tung Oil China Wood Oil, Wet Chlorine, Coal Tar Creosote, Dichloro-Butane, Ethylene Glycol, Freon 31, Hydroquinone, Petroleum Base Lubricating Oils, Sodium Bicarbonate, Sodium Chloride, Sulfur Hexafluoride.

Polysulfide is not suitable for o-rings exposed in the environment containing chemicals such as Acetamide, Acetophenone, Acetyl Chloride, Acrylonitrile, Aluminium Acetate, Aluminium Chloride, Aluminium Flouride, Anhydrous Ammonia, Hot Gas Ammonia, Concentrated Ammonium Hydroxide, Ammonium Sulfate, Amyl Acetate, Animal Oil, Arachlor 1248, Automotive Brake Fluid, Beer, Benzaldehyde, Benzene Sulfonic Acid, Benzyl Alcohol, Benzyl Benzoate, Benzyl Chloride, Bleach Liquor, Borax Solutions, Boric Acid, Butter, Butyl Carbitol, Calcium Carbonate, Calcium Hypochlorite, Calcium Sulfide, Carbolic Acid (Phenol), Carbon Monoxide, Carbon Tetrachloride, Chloracetic Acid, Chlorinated Solvents, Chlorine Dioxide, Chlorine Trifluoride, Dry Chlorine, Chloroform, Chlorosulfonic Acid, Chrome Plating Solution, Chromic Acid, Citric Acid, Cod Liver Oil, Coffee, Coolanol Monsanto, Corn Oil, Creosylic Acid, Dioxane, Dowtherm A, Ethyl Benzene, Ethyl Cellulose, Ethyl Chloride, Ethyl Chlorocarbonate, Ethyl Diamine, Ethyl Formate, Ethyl Mercaptan, Ethyl Pentachlorobenzene, Ethylene Dichloride, Ethylene Trichloride, Freon 21, Freon 22, Furfuryl Alcohol, Glucose, Hydrazine, Hydrochloric Acid, Hydrocyanic Acid, Hydrofluoric Acid, Isopropyl Chloride, Animal Fat Lard, Hydraulic Fluid (Phosphate Ester Type) Lindol, Linoleic Acid, Methyl Chloride, Methylene Chloride, Naphthalene, Neatsfoot Oil, Nitric Acid, Nitrobenzene, Nitrogen Tetroxide, N-Octane, Oleum (Fuming Sulfuric Acid), Oxalic Acid, 200-400F Oxygen, Cold Oxygen, Peanut Oil, Petroleum Oil, Phenol, Phenylhydrazine, Phosphoric Acid, Producer Gas, 540C 312F 230C Pydraul, Transformer Oil Pyranol, 55 (Phosphate Ester) 53 43 Pyrogard 42, Radiation, Rapeseed Oil, Sea Water, Skydrol 500, Sodium Carbonate, Soyabean Oil, Styrene Monomer, Sucrose Solutions, Sulfur Chloride, Dry Sulfur Dioxide Gas, Wet Sulfur Dioxide Gas, Liquefied Under Pressure Sulfur Dioxide, Sulfur Trioxide, Sulfuric Acid (Concentrated), Sulfurous Acid, Tartaric Acid, Tertiary Butyl Mercaptan, Tetrabromoethane, Tetrachloroethylene, Tetralin, Triethanolamine, VV-H-910, Wagner 21B Brake Fluid, Fresh Water, Whiskey.