Link: http://adteputek.com/b2evolution/blog2.php/2009/05/04/2009-05-04-why-flurosilicone-rubber-inst

Fluorosilicone sheeting is designed to be used in applications where normal silicone would degrade by harsh chemicals or fluids and is used where extreme conditions exist. This material will perform within a temperature range of -65°F to +500°F (like silicone rubber). Fluorosilicone is extremely resistant to fuels and solvents, and naturally resistant to ozone. The higher the number, the better chemical resistance of flurosilicone with the chemical. (4) Good resistance (Highest rating) (3) Fair resistance (2) Sometimes OK (1) Poor Resistance (0) No Data: Acetaldehyde (0) Acetamide (4) Acetic Acid, Glacial (1) Acetic Anhydride (1) Acetone (1) Acetophenone (1) Acetyl Chloride (4) Acetylene Gas (2) Acrylonitrile (1) Air below 200 C (4) Alkazene (3) Aluminium Acetate (1) Aluminium Chloride (4) Aluminium Flouride (4) Aluminium Nitrate (0) Aluminium Sulfate (4) Ammonia, Anhydrous (1) Ammonia, Gas, Cold (0) Ammonia, Gas, Hot (1) Ammonium Carbonate (0) Ammonium Chloride (1) Ammonium Hydroxide, Concentrated (4) Ammonium Nitrate (2) Ammonium Persulfate Solution (0) Ammonium Phosphate (0) Ammonium Sulfate (4) Amyl Acetate (1) Amyl Alcohol (4) Amyl Borate (0) Amyl Chloronaphthalene (3) Aniline (2) Aniline Oil (2) Animal Oil (4) Arachlor 1248 (3) Argon (3) Aromatic Fuel 50% (3) Askarel Transformer Oil (3) ASTM Fuel A (3) ASTM Fuel B (3) ASTM Fuel C (3) ASTM Fuel D (0) ASTM Oil Four (3) ASTM Oil One (4) ASTM Oil Three (4) ASTM Oil Two (4) Automatic Transmission Fluid (0) Automotive Brake Fluid (1) Beer (4) Benzaldehyde (1) Benzene (3) Benzene Sulfonic Acid (3) Benzine (Ligroin) (4) Benzoic Acid (3) Benzophenone (4) Benzyl Alcohol (3) Benzyl Benzoate (4) Benzyl Chloride (3) Bleach Liquor (3) Borax Solutions (3) Boric Acid (4) Brake Fluid (1) Bromine Gas (3) Bromobenzene (3) Bunker Oil (4) Butadiene Monomer (3) Butane (3) Butter (4) Butyl Alcohol (4) Butyl Carbitol (1) Butyl Cellosolve (1) Butyraldehyde (1) Calcium Carbonate (4) Calcium Chloride (4) Calcium Hydroxide (3) Calcium Hypochlorite (3) Calcium Nitrate (4) Calcium Sulfide (4) Carbitol 2 (3) Carbolic Acid (Phenol) (3) Carbon Disulfide (3) Carbon Monoxide (3) Carbon Tetrachloride (2) Carbonic Acid (4) Castor Oil (4) Cellosolve (1) China Wood Oil, Tung Oil (3) Chloracetic Acid (1) Chlordane (3) Chlorinated Solvents (4) Chlorine Dioxide (3) Chlorine Trifluoride (0) Chlorine, Dry (4) Chlorine, Wet (3) Chloroform (0) Chlorosulfonic Acid (1) Chrome Plating Solution (3) Chromic Acid (4) Citric Acid (4) Cod Liver Oil (4) Coffee (4) Coolanol Monsanto (3) Corn Oil (4) Creosote, Coal Tar (4) Creosylic Acid (0) Crude Oil (Asphalt Base) (3) Cyclohexane (3) Denatured Alcohol (4) Diacetone (1) Diacetone Alcohol (1) Dibenzyl Ether (0) Dibutyl Phthalate (2) Dichloro-Butane (3) Diesel Oil (4) Di-ester Lubricant MIL-L-7808 (4) Diethylamine (1) Diethylamine Glycol (4) Dimethyl Formamide (1) Dimethyl Phthalate (3) Dioxane (1) Diphenyl (3) Dow Corning 550 (3) Dow Guard (4) Dowtherm A (4) Elco 28 Lubricant (4) Epoxy Resins (0) Ethane (3) Ethanol (4) Ethyl Acetoacetate (1) Ethyl Alcohol (4) Ethyl Benzene (4) Ethyl Benzoate (4) Ethyl Cellulose (1) Ethyl Chloride (4) Ethyl Chlorocarbonate (3) Ethyl Diamine (1) Ethyl Ether (1) Ethyl Formate (4) Ethyl Hexanol (4) Ethyl Mercaptan (0) Ethyl Oxalate (3) Ethyl Pentachlorobenzene (3) Ethyl Silicate (4) Ethylene (4) Ethylene Dichloride (1) Ethylene Glycol (4) Ethylene Oxide (1) Ethylene Trichloride (2) Formaldehyde (0) Freon 11 (M) (3) Freon 112 (0) Freon 113 (1) Freon 114 (3) Freon 114B2 (0) Freon 12 (0) Freon 13 (1) Freon 21 (0) Freon 22 (0) Freon 31 (0) Freon 32 (0) Freon 502 (F22+F316) (0) Freon C318 (0) FREON R134A (0) Freon TF (1) Fuel Oil (4) Furan (0) Furfural (1) Furfuryl Alcohol (1) Gallic Acid (4) Gasoline, Automotive (4) Gelatine (4) Glucose (4) Glycerin (4) Glycol, General (4) Grease, Petroleum Base (4) Helium (4) Heptane (4) Hexane (4) Hexyl Alcohol (3) Hydraulic Oil, Petroleum Base (4) Hydrazine (1) Hydrobromic Acid (4) Hydrobromic Acid, Gas (1) Hydrochloric Acid (0) Hydrocyanic Acid (3) Hydrofluoric Acid (1) Hydrogen Gas (2) Hydrogen Peroxide (3) Hydroquinone (3) Iodine (4) Iso Octane (3) Isobutyl Alcohol (3) Isopropanol (3) Isopropyl Acetate (1) Isopropyl Chloride (3) Isopropyl Ether (2) JP 3 MIL-J5624 (3) JP 4 MIL-J5624 (3) JP 5 MIL-J5624 (3) JP 6 MIL-J5624 (3) Kerosene (4) Lacquer Solvents (1) Lacquers (1) Lard, Animal Fat (4) Lindol, Hydraulic Fluid (Phosphate Ester Type) (2) Linoleic Acid (0) Linsed Oil (4) Liquefied Petroleum Gas (LPG) (3) Lubricating Oils, Petroleum Base (4) Lye (3) Malathion (3) Maleic Acid (0) Mercuric Chloride (4) Mercury (0) Methane (0) Methanol (4) Methyl Acetate (1) Methyl Acrylate (1) Methyl Alcohol (4) Methyl Bromide (4) Methyl Butyl Ketone (1) Methyl Cellosolve (1) Methyl Chloride (3) Methyl Ether (4) Methyl Ethyl Ketone (MEK) (1) Methyl Isobutyl Ketone (MIBK) (1) Methyl Mercaptan (0) Methyl Methacrylate (1) Methyl Oleate (3) Methyl Propyl Salicylate (0) Methylacrylic Acid (0) Methylene Chloride (3) MIL-F-25558 (RJ-1) (4) MIL-F-25656 (3) MIL-G-25760 (3) MIL-H-5606 (4) MIL-H-7083 (4) MIL-J 5624, JP-3, JP-4, JP-5 (3) Milk (4) MIL-L-25681 (3) MIL-R-25576 (RP-1) (4) MIL-S-3136, Type 1 Fuel (4) MIL-S-81087 (4) Mineral Oils (4) Monovinyl Acetate (4) Naphtha (1) Naphthalene (4) Naphthalenic (4) Natural Gas (0) Neatsfoot Oil (4) N-Hexaldehyde (1) Nitric Acid (0) Nitrobenzene (1) Nitroethane (1) Nitrogen Tetroxide (1) Nitrogen, Gas (4) Nitromethane (1) Nitropropane (1) N-Octane (3) N-Pentane (2) Octyl Alcohol (3) Oleic Acid (4) Oleum (Fuming Sulfuric Acid) (1) Oronite 8200 (4) Oxalic Acid (4) Oxygen, 200-400F (0) Oxygen, Cold (4) Ozone (4) Peanut Oil (4) Petroleum Oil (4) Phenol (3) Phenylhydrazine (0) Phosphoric Acid (2) Phosphoric Trichloride (4) Pine Oil (4) Potassium Nitrate (4) Potassium Sulfate (4) Producer Gas (3) Propane (3) Propanol (4) Propyl Acetate (1) Propyl Alcohol (4) Propylene (3) Propylene Oxide (1) Pydraul, 10E (1) Pydraul, 230C, 312F, 540C (1) Pydraul, 30E, 50E, 65E, 90E (4) Pyranol, Transformer Oil (4) Pyrogard 42, 43, 53, 55 (Phosphate Ester) (1) Radiation (1) Rapeseed Oil (4) Red Oil (4) RJ-1 (MIL-F-25558) (4) RP-1 (MIL-R-25576) (4) Sea Water (4) Silicone Grease (4) Silicone Oils (4) Silver Nitrate (4) Skydrol 500 (0) Sodium Bicarbonate (4) Sodium Carbonate (4) Sodium Chloride (4) Sodium Hydroxide (0) Soyabean Oil (4) Steam to 350F (1) Stearic Acid (2) Stoddard Solvent (4) Styrene Monomer (2) Sucrose Solutions (2) Sulfur Chloride (4) Sulfur Dioxide Gas, Dry (3) Sulfur Dioxide Gas, Wet (3) Sulfur Dioxide, Liquefied Under Pressure (3) Sulfur Hexafluoride (3) Sulfur Trioxide (3) Sulfuric Acid (Concentrated) (0) Sulfurous Acid (0) Tannic Acid (4) Tartaric Acid (4) Tertiary Butyl Alcohol (3) Tertiary Butyl Mercaptan (0) Tetrabromoethane (3) Tetrabutyl Titanate (4) Tetrachloroethane (0) Tetrachloroethylene (3) Tetraethyl Lead (0) Tetrahydrofuran (1) Tetralin (4) Toluene (3) Transmission Fluid, Type A (4) Triethanolamine (1) Turbine Oil (3) Turpentine (3) Varnish (3) Vinegar (2) VV-H-910 (3) Wagner 21B Brake Fluid (1) Water, Fresh (4) Whiskey (4) White Pine Tar (4) Xylene (0)