What is Durometer?

Real world durometer examples
Real world shore A durometer examples

Durometer is a measure of how hard a material is. Technically, it’s a measure of how hard it is to permanently indent a material. There are actually 12 different durometer scales each measured from 0 (softest) to 100 (hardest), but for the we’ll mainly be talking about Shore A since it’s the most common in fluid sealing applications.

How is Durometer Measured?

Measuring durometer is fairly simple. You put a standard metal rod at a standard pressure on to a material for 15 seconds, then you measure the depth of the indentation. For example, in Shore A durometer testing, 1.1 to 1.4 mm diameter steel rod with is applied with .822 Kg of mass (1.81 lb) on a sheet of rubber for 15 seconds.

Which Durometer is right for your Project?

Property Low Durometer High Durometer
Durability Less Durable
More easily marked
More Durable
Harder to mark
Compressibility More Compressible Less Compressible
Flexibility More Flexible
Better for curved surfaces
Less Flexible

Garlock Gasket Material Chemical Compatibility Table

Medium Gylon 3500 Gylon 3504
3565
Gylon 3510 Gylon 3560 Gylon 3561 Gylon 3535
3540
3545
Gylon 3530 Style 9900
9850
5500
Style 9800 Style 706 Style 3000
2950
2900
Style 3400
3200
2920
Style 3300
2930
Style 5507
3700
A = Suitable B = Depends on Conditions C = Unsuitable U = Unknown (No Data)
Abietic Acid A A A A A A A A U A A U U U
Acetaldehyde A A A A A A A C C C C C C B
Acetamide A A A A A A A A C A A C A B
Acetic Acid (Crude, Glacial, Pure) A1 A1 A1 A1 A1 A1 A1 B1 B1 B1 B1 B1 B1 B1
Acetic Anhydride A1 A1 A1 A1 A1 A1 A1 B1 B1 B1 B1 B1 B1 B1
Acetone A A A A A A A C B C C B B A
Acetonitrile A A A A A A A C U C C U B B
Acetophenone A A A A A A A C C C C C C B
2-Acetylaminofluorene A A A A A A A C C C C C C C
Acetylene A A A A A A A A B A A B A B
Acrolein A1 A1 A1 A1 A1 A1 A1 B1 C B1 B1 C B1 B1
Acrylamide A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Acrylic Acid A1 A1 A1 A1 A1 A1 A1 C C C C C C B1
Acrylic Anhydride A1 A1 A1 A1 A1 A1 A1 U U U U U U U
Acrylonitrile A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Air, 150°F and below A A A A A A A A A A A A A A
Allyl Acetate A A A A A A A C C C C C C B
Allyl Chloride A A A B B A A C C C C C C B
Allyl Methacrylate A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Aluminum Chloride A A A B B A A A A A A A A A
Aluminum Fluoride C U A C C A A C C C C C C C
Aluminum Hydroxide (Solid) A A A A A A A A A A A A A A
Aluminum Nitrate A A A A A A U B B B B B B B
Aluminum Sulfate A A A B B A A A A A A A A A
Alums A A A B B A A A A A A A A A
4-Aminodiphenyl A A A A A A A C C C C C C C
Ammonia, Gas, 150°F and below A A A A A A A A A B A A A A
Ammonia Gas, Above 150°F A A A A A A A C C C C C B B
Ammonia Liquid, Anhydrous A A A A A A A B U B B U A A
Ammonium Chloride A A A B B A A A A A A A A A
Ammonium Hydroxide A A A A A A A A A A A A A A
Ammonium Nitrate A A A A A A U B B B B B B B
Ammonium Phosphate, Monobasic A A A A A A A A A A A A A A
Ammonium Phosphate, Dibasic A A A A A A A A A A A A A A
Ammonium Phosphate, Tribasic A A A A A A A A A A A A A A
Ammonium Sulfate A A A B B A A A A A A A A A
Amyl Acetate A A A A A A A C C C C C C B
Amyl Alcohol A A A A A A A A A A A A A A
Aniline, Aniline Oil A A A A A A A C C C C C C B
Aniline Dyes A A A A A A A C B C C B B B
o-Anisidine A A A A A A A C C C C C C C
Aqua Regia A A A B B A C C C C C C C C
Aroclors A A A A A A A C C C C C C C
Asphalt A A A A A A A A C A A C B C
Aviation Gasoline A A A A A A A B C B B C B C
Barium Chloride A A A B B A A A A A A A A A
Barium Hydroxide A A A A A A A A A A A A A A
Barium Sulfide A A A A A A A A A A A A A A
Baygon A A A A A A A C C C C C U U
Beer 10 A A A A A A A A A A A A A A
Benzaldehyde A A A A A A A C C C C C C B
Benzene, Benzol A A A A A A A C C C C C C C
Benzidine A A A A A A A C C C C C C U
Benzoic Acid A A A A A A A B B B B B B B
Benzonitrile A A A A A A A C U C C U U C
Benzotrichloride A A A C C A A C C C C C C C
Benzoyl Chloride A A A U U A A C U C C U C C
Benzyl Alcohol A A A A A A A C U C C U B B
Benzyl Chloride A A A U U A A C C C C C C B
Bio-diesel (B100) A A A A A A A A A A A A U
Biphenyl A A A B B A A C C C C C C C
Bis(2-chloroethyl)ether A A A U U A A C C C C C C C
Bis(chloromethyl)ether A A A U U A A C C C C C C B
Bis(2-ethylhexyl)phthalate A A A A A A A C C C C C C B
Black Sulfate Liquor C B A C A A A C C C C C C C
Blast Furnace Gas A A A A A A A B C B B C B C
Bleach (Sodium Hyprochlorite) A A A B B A U C U C C U C C
Boiler Feed Water A A A A A A A A A A A A A A
Borax A A A A A A A A A A A A A A
Boric Acid A A A A A A A A A A A A A A
Brine (Sodium Chloride) A A A B B A A A A A A A A A
Bromine A A A C C A U C C C C C C C
Bromine Trifluoride C C C C C C C C C C C C C C
Bromoform A A A A A A A C C C C C C C
Bromomethane A A A A A A A C C C C C C C
Butadiene A1 A1 A1 A1 A1 A1 A1 C C C C C U C
Butane A A A A A A A A C B A C B C
2-Butanone A A A A A A A C C C C C C C
Butyl Acetate A A A A A A A C C C C C C B
Butyl Alcohol, Butanol A A A A A A A A A A A A A A
n-Butyl Amine A A A A A A A B U B B U C B
tert-Butyl Amine A A A A A A A B U B B U C B
Butyl Methacrylate A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Butyric Acid A A A A A A A A A A A A A A
Calcium Bisulfite A A A A A A A B U B B U B C
Calcium Chloride A A A B B A A A A A A A A A
Calcium Cyanamide A A A A A A A B B B B B B B
Calcium Hydroxide U A A U A A A A A A A A A A
Calcium Hypochlorite A A A B B A U B B B C C C C2
Calcium Nitrate A A A U U A C U U U U U U U
Calflo AF A A A A A A A A C A A C U C
Calflo FG A A A A A A A A C A A C U C
Calflo HTF A A A A A A A A C A A C U C
Calflo LT A A A A A A A A C A A C U C
Cane Sugar Liquors A A A A A A A A A A A A A A
Caprolactam A A A A A A A C C C C C C B
Captan A A A A A A A C C C C C C C
Carbaryl A A A A A A A C C C C C C C
Carbolic Acid, Phenol A A A A A A A C C C C C C B
Carbon Dioxide, Dry A A A A A A A A A A A A A A
Carbon Dioxide, Wet A A A A A A A A A A A A A A
Carbon Disulfide A A A A A A A C C C C C C C
Carbon Monoxide A A A A A A A B B B B B B B
Carbon Tetrachloride A A A B B A A C C C C C C C
Carbonic Acid A A A A A A A A A A A A A A
Carbonyl Sulfide A A A U U A A C C C C C C C
Castor Oil A A A A A A A A C A A C B B
Catechol A A A A A A A C B C C B U U
Caustic Soda C B A6 C A6 A11 A6 C C C C C C C
Cetane (Hexadecane) A A A A A A A A C A A C B C
China Wood Oil A A A A A A A A C A A C B C
Chloramben A A A U U A A C C C C C C C
Chlorazotic Acid (Aqua Regia) A A A B B A C C C C C C C C
Chlordane A A A U U A A C C C C C C C
Chlorinated Solvents, Dry A A A A A A A C C C C C C C
Chlorinated Solvents, Wet A A A C C A A C C C C C C C
Chlorine, Dry A A A A A A A U U U U U U U
Chlorine, Wet A A A C C A A C C C C C C C
Chlorine Dioxide A A A U U A C C C C C C C C
Chlorine Trifluoride C C C C C C C C C C C C C C
Chloroacetic Acid A A A C C A A C B C C B C B
2-Chloroacetophenone A A A B B A A C C C C C C C
Chloroazotic Acid (Aqua Regia) A A A B B A C C C C C C C C
Chlorobenzene A A A A A A A C C C C C C C
Chlorobenzilate A A A U U A A C C C C C C C
Chloroethane A A A A A A A C C C C C C C
Chloroethylene A A A A A A A C C C C C C C
Chloroform A A A A A A A C C C C C C C
Chloromethyl Methyl Ether A A A U U A A C C C C C C C
Chloronitrous Acid (Aqua Regia) A A A B B A C C C C C C C C
Chloroprene A A A B B A A C C C C C C C
Chlorosulfonic Acid A A A U U A U C C C C C C C
Chrome Plating Solutions U5 U5 A U B A A C C C C C C
Chromic Acid A A A B B A C C C C C C C C
Chromic Anhydride A A A B B A C C C C C C C C
Chromium Trioxide A A A B B A C C C C C C C C
Citric Acid A A A A A A A A A A A A A A
Coke Oven Gas A A A A A A A C C C C C C C
Copper Chloride A A A C C A A A A A A A A A
Copper Sulfate A A A A A A A A A A A A A A
Corn Oil 10 A A A A A A A A C A A C B B
Cotton Seed Oil 10 A A A A A A A A C A A C B B
Creosote A A A A A A A B C B B C B C
Cresols, Cresylic Acid A A A A A A A C C C C C C C
Crotonic Acid A A A U U A A C C C C C C C
Crude Oil A A A B B A A A B A A B B C
Cumene A A A A A A A C C C C C C C
Cyclohexane A A A A A A A A C A A C B C
Cyclohexanone A A A A A A A C C C C C C B
2,4-D, Salts and Esters A A A U U A A C C C C C C C
Detergent Solutions B3 B3 A A A A A B3 B3 B3 B3 B3 B3 B3
Diazomethane A A A A A A A U U U U U U U
Dibenzofuran A A A A A A A C C C C C C C
Dibenzylether A A A A A A A C C C C C C C
1,2-Dibromo-3-chloropropane A A A B B A A C C C C C C C
Dibromoethane A A A A A A A C C C C C C C
Dibutyl Phthalate A A A A A A A C C C C C C B
Dibutyl Sebacate A A A A A A A C C C C C C B
o-Dichlorobenzene A A A A A A A C C C C C C C
1,4-Dichlorobenzene A A A A A A A C C C C C C C
3,3-Dichlorobenzidene A A A U U A A C C C C C C C
Dichloroethane (1,1 or 1,2) A A A A A A A C C C C C C C
1,1-Dichloroethylene A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Dichloroethyl Ether A A A U U A A C C C C C C C
Dichloromethane A A A A A A A C C C C C C C
1,2-Dichloropropane A A A A A A A C C C C C C C
1,3-Dichloropropene A A A B B A A C C C C C C C
Dichlorvos A A A B B A A C C C C C C C
Diesel Oil A A A A A A A A B A A B B C
Diethanolamine A A A A A A A B B B B B B B
N,N-Diethylaniline A A A U U A A C C C C C C C
Diethyl Carbonate A A A U U A A C U C C U C U
Diethyl Sulfate A A A A A A A C C C C C U C
3,3-Dimethoxybenzidene A A A A A A A C C C C C U U
Dimethylaminoazobenzene A A A A A A A U U U U U U U
N,N-Dimethyl Aniline A A A U U A A C C C C C C C
3,3-Dimethylbenzidine A A A A A A A C C C C C C C
Dimethyl Carbamoyl Chloride A A A C C A A C C C C C C C
Dimethyl Ether A A A A A A A B C B B C B B
Dimethylformamide A A A U U A A C C C C C C C
Dimethyl Hydrazine, Unsymmetrical A A A A A A A C B C C B B B
Dimethyl Phthalate A A A A A A A C C C C C C B
Dimethyl Sulfate A A A A A A A C C C C C U C
4,6-Dinitro-o-Cresol and Salts A A A A A A A C C C C C C C
2,4-Dinitrophenol A A A U U A A C C C C C C C
2,4-Dinitrotoluene A A A A A A A C C C C C C C
Dioxane A A A A A A A C C C C C C B
1,2-Diphenylhydrazine A A A A A A A C B C C B U U
Diphyl DT A A A A A A A C C C C C C C
Dowfrost A A A A A A A B B B B B U B
Dowfrost HD A A A A A A A B B B B B U B
Dowtherm 4000 A A A A A A A B B B B B B B
Dowtherm A A A A A A A A C C C C C C C
Dowtherm E A A A A A A A C C C C C C C
Dowtherm G A A A A A A A C C C C C C C
Dowtherm HT A A A A A A A C C C C C C C
Dowtherm J A A A A A A A C C C C C C C
Dowtherm Q A A A A A A A C C C C C C C
Dowtherm SR-1 A A A A A A A B B B B B B B
Epichlorohydrin A A A A A A A C C C C C C B
E85 (85% Ethanol, 15% Gas) A A A A A A A A A A A A U
1,2-Epoxybutane A A A A A A A U C U U C C C
Ethane A A A A A A A A B B A B B C
Ethanol, Ethyl Alcohol 10 A A A A A A A A A A A A A A
Ethers A A A A A A A B C B B C B B
Ethyl Acetate A A A A A A A C C C C C C C
Ethyl Acrylate A1 A1 A1 A1 A1 A1 A1 C C C C C C B1
Ethyl Alcohol 10 A A A A A A A A A A A A A A
Ethylbenzene A A A A A A A C C C C C C C
Ethyl Carbamate A A A A A A A C C C C C B B
Ethyl Cellulose A A A A A A A A A A A A A A
Ethyl Chloride A A A A A A A C C C C C C C
Ethyl Ether A A A A A A A B C B B C B B
Ethyl Hexoate A A A A A A A C U C C U U B
Ethylene A A A A A A A A B B A B B C
Ethylene Bromide A A A A A A A C C C C C C C
Ethylene Dibromide A A A A A A A C C C C C C C
Ethylene Dichloride A A A A A A A C C C C C C C
Ethylene Glycol A A A A A A A A A A A A A A
Ethyleneimine U U A U U A A C C C C C C C
Ethylene Oxide A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Ethylene Thiourea A A A A A A A U U U U U C C
Ethylidine Chloride A A A A A A A C C C C C C C
Ferric Chloride A A A C C A A A A A B B B B
4 Ferric Phosphate A A A U U A A B B B B B B B
Ferric Sulfate A A A B B A A A A A A A A A
Fluorine, Gas U U U U U A14 C C C C C C C C
Fluorine, Liquid U U U C C U C C C C C C C C
Fluorine Dioxide C C C C C C C C C C C C C C
Formaldehyde A1 A1 A1 A1 A1 A1 A1 A1 B1 A1 A1 B1 B1 A1
Formic Acid A A A B B A A C U C C U B B
Fuel Oil A A A A A A A A B A A B B C
Fuel Oil, Acid A A A A A A A A B A A B B C
Furfural A A A A A A A C C C C C B B
Gasoline, Refined A A A A A A A A C A A B B C
Gasoline, Sour A A A A A A A A C A A B B C
Gelatin A A A A A A A A A A A A A A
Glucose A A A A A A A A A A A A A A
Glue, Protein Base A A A A A A A A A A A A A A
Glycerine, Glycerol A A A A A A A A A A A A A A
Glycol A A A A A A A A A A A A A A
Grain Alcohol 10 A A A A A A A A A A A A A A
Grease, Petroleum Base A A A A A A A A C A A C U C
Green Sulfate Liquor C B A U A A A C C C C C C C
Heptachlor A A A U U A A C C C C C C C
Heptane A A A A A A A A C A A C B C
Hexachlorobenzene A A A A A A A C C C C C C C
Hexachlorobutadiene A A A A A A A C C C C C C C
Hexachlorocyclopentadiene A A A A A A A C C C C C C C
Hexachloroethane A A A U U A A C C C C C C C
Hexadecane A A A A A A A A C A A C B C
Hexamethylene Diisocyanate A A A A A A A U C U U C U C
Hexamethylphosphoramide A A A A A A A U C U U C U U
Hexane A A A A A A A A C A A C B C
Hexone A A A A A A A C C C C C C B
Hydraulic Oil, Mineral A A A A A A A A B A A B B C
Hydraulic Oil, Synthetic (Phosphate Esters) A A A A A A A C C C C C C B
Hydrazine A A A A A A A C B C C B B B
Hydrobromic Acid A A A C C A A C C C C C C C
Hydrochloric Acid A A A C C A A C C C C C C C
Hydrocyanic Acid A A A A A A A A B A A B B A
Hydrofluoric Acid, Anhydrous C C C C C A A C C C C C C C
HF Acid, Less than 65%, Above 150°F C C A C C A A C C C C C C C
HF Acid, 65% to Anhydrous,Above 150°F C C U C C A A C C C C C C C
HF Acid, Up to Anhydrous,150°F & below C C A C C A A C C C C C C C
Hydrofluorosilicic Acid C C A C C A A C C C C C C C
Hydrofluosilicic Acid C C A C C A A C C C C C C C
Hydrogen A A A A A A A A A B A A A A
Hydrogen Bromide A A A U U A A C C C C C C C
Hydrogen Fluoride C C C C C A A C C C C C C C
Hydrogen Peroxide, 10% A A A A A A A B B B B B B B
Hydrogen Peroxide, 10-90% A A A B B A C B U B B U C B
Hydrogen Sulfide, Dry or Wet A A A A A A A B B B B B B B
Hydroquinone A A A A A A A C B C C B C C
Iodine Pentafluoride U U U U U U C C C C C C C C
Iodomethane A A A A A A A C C C C C B U
Isobutane A A A A A A A A C B A C B C
Isooctane A A A A A A A A C A A C B C
Isophorone A A A A A A A C C C C C C B
Isopropyl Alcohol A A A A A A A A A A A A A A
Jet Fuels (JP Types) A A A A A A A A C A A C B C
Kerosene A A A A A A A A C A A C B C
Lacquer Solvents A A A A A A A C C C C C C C
Lacquers A A A A A A A C C C C C C C
Lactic Acid, 150°F and below A A A A A A A A A A A A A A
Lactic Acid, Above 150°F A A A A A A A U U U U U U U
Lime Saltpeter (Calcium Nitrates) A A A U U A C B B B B B B B
Lindane A A A B B A A C C C C C C C
Linseed Oil A A A A A A A A B A A B A B
Liquified Petroleum Gas (LPG) A A A A A A A A B C A B B C
Lithium Bromide A A A A A A A A U A A U A A
Lithium, Elemental C C C C C C C C C C C C C C
Lubricating Oils, Refined A A A A A A A A B A A B B C
Lubricating Oils, Mineral or Petroleum Types A A A A A A A A B A A B B C
Lubricating Oils, Sour A A A A A A A B B B B B B C
Lye C B A6 C A6 A11 A6 C C C C C C C
Magnesium Chloride A A A B B A A A A A A A A A
Magnesium Hydroxide A A A A A A A B B B B B B B
Magnesium Sulfate A A A A A A A A A A A A A A
Maleic Acid A A A A A A A B B B B B B A
Maleic Anhydride A A A A A A A C U C C U C C
Mercuric Chloride A A A C C A A A A A A A B A
Mercury A A A A A A A A A A A A A A
Methane A A A A A A A A B B A C B C
Methanol, Methyl Alcohol A A A A A A A A A A A A A A
Methoxychlor A A A A A A A C C C C C C C
Methylacrylic Acid A A A U U A A C C C C C C C
Methyl Alcohol A A A A A A A A A A A A A A
2-Methylaziridine U U A U U A A C C C C C C C
Methyl Bromide A A A A A A A C C C C C C C
Methyl Chloride A A A B B A A C C C C C C C
Methyl Chloroform A A A A A A A C C C C C C C
4,4 Methylene Bis(2-chloroaniline) A A A U U A A C C C C C C C
Methylene Chloride A A A A A A A C C C C C C C
4,4-Methylene Dianiline A A A A A A A C C C C C C U
Methylene Diphenyldiisocyanate A A A U U A A C C C C C C U
Methyl Ethyl Ketone A A A A A A A C C C C C C C
Methyl Hydrazine A A A A A A A C B C C B B B
Methyl Iodide A A A A A A A C C C C C B U
Methyl Isobutyl Ketone (MIBK) A A A A A A A C C C C C C B
Methyl Isocyanate A A A A A A A U C U C U U
Methyl Methacrylate A1 A1 A1 A1 A1 A1 A1 C C C C C C C
N-Methyl-2-Pyrrolidone A A A A A A A C B C C B U U
Methyl Tert. Butyl Ether (MTBE) A A A A A A A B C B B B C C
Milk 10 A A A A A A A A A A A A A A
Mineral Oils A A A A A A A A B A A B B C
Mobiltherm 600 A A A A A A A A C A A C U C
Mobiltherm 603 A A A A A A A A C A A C U C
Mobiltherm 605 A A A A A A A A C A A C U C
Mobiltherm Light A A A A A A A C C C C C C C
Molten Alkali Metals C C C C C C C C C C C C C C
Monomethylamine A A A A A A A C B C C B A B
MultiTherm 100 A A A A A A A A C A A C B C
MultiTherm 503 A A A A A A A A C A A C U C
MultiTherm IG-2 A A A A A A A A C A A C B C
MultiTherm PG-1 A A A A A A A A C A A C B C
Muriatic Acid A A A C C A A C C C C C C C
Naphtha A A A A A A A A C A A C B C
Naphthalene A A A A A A A C C C C C C C
Naphthols A A A U U A A U U U U U U U
Natural Gas A A A A A A A A B B A B B B
Nickel Chloride A A A B B A A A A A A A A A
Nickel Sulfate A A A A A A A A A A A A A A
Nitric Acid, Less than 30% A A A A A A C C C C C C C C
Nitric Acid, Above 30% A A A A A A C C C C C C C C
Nitric Acid, Crude A A A U U A C C C C C C C C
Nitric Acid, Red Fuming A A A B B A C C C C C C C C
Nitrobenzene A A A A A A A C C C C C C C
4-Nitrobiphenyl A A A A A A A C C C C C C C
2-Nitro-Butanol A A A U U A U C U C C U C U
Nitrocalcite (Calcium Nitrate) A A A U U A C B B B B B B B
Nitrogen A A A A A A A A A A A A A A
Nitrogen Tetroxide A A A U U A U C C C C C C C
Nitrohydrochloric Acid (Aqua Regia) A A A B B A C C C C C C C C
Nitromethane A A A A A A A C U C C U C U
2-Nitro-2-Methyl Propanol A A A U U A U C U C C U C U
Nitromuriatic Acid (Aqua Regia) A A A B B A C C C C C C C C
4-Nitrophenol A A A U U A A C C C C C C C
2-Nitropropane A A A A A A A C U C C U C C
N-Nitrosodimethylamine A A A A A A A B B B B B U U
N-Nitroso-N-Methylurea A A A U U A A U U U U U U U
N-Nitrosomorpholine A A A A A A A C U C C U C U
Norge Niter (Calcium Nitrate) A A A U U A C B B B B B B B
Norwegian Saltpeter (Calcium Nitrate) A A A U U A C B B B B B B B
N-Octadecyl Alcohol A A A A A A A A A A A A U A
Octane A A A A A A A A C A A C B C
Oil, Petroleum A A A A A A A A B A A B B C
Oils, Animal and Vegetable 10 A A A A A A A A C A A C B B
Oleic Acid A A A A A A A B U B B U C C
Oleum A U C C C A U C C C C C C C
Orthodichlorobenzene A A A A A A A C C C C C C C
Oxalic Acid A A A B B A A C U C C U B B
Palmitic Acid A A A A A A A A B A A B B A
Paraffin A A A A A A A A B A A B B C
Paratherm HE A A A A A A A A C A A C B C
Paratherm NF A A A A A A A A C A A C U C
Parathion A A A A A A A C C C C C C C
Paraxylene A A A A A A A C C C C C C C
Pentachloronitrobenzene A A A U U A A C C C C C C C
Pentachlorophenol A A A A A A A C C C C C C C
Pentane A A A A A A A A C A A C B C
Perchloric Acid A A A C C A C C C C C C C C
Perchloroethylene A A A A A A A C C C C C C C
Petroleum Oils, Crude A A A A A A A A B A A B B C
Petroleum Oils, Refined A A A A A A A A B A A B B C
Phenol A A A A A A A C C C C C C B
p-Phenylenediamine A A A A A A A C C C C C U U
Phosgene A A A B B A A C U C C U U B
Phosphate Esters A A A A A A A C C C C C C B
Phosphine A A A A A A A U U U U U U U
Phosphoric Acid, Crude C C A C B A A C C C C C C C
Phosphoric Acid, Less than 45% A A A A A A A C C C C C C C
Phosphoric Acid, Above 45%, to 150°F B B A B B A A C C C C C C C
Phosphoric Acid, Above 45%, Above 150°F C B A C B A A C C C C C U U
Phosphorus, Elemental A A A A A A A C C C C C C C
Phosphorus Pentachloride A A A B B A A C C C C C C C
Phthalic Acid A A A A A A A C U C C U B U
Phthalic Anhydride A A A A A A A C U C C U C B
Picric Acid, Molten U U U U U U U U U U U U U U
Picric Acid, Water Solution A A A A A A A B B B B B B B
Pinene A A A A A A A A C A A C B C
Piperidine A A A A A A A C C C C C C C
Polyacrylonitrile A A A A A A A A A A A A A A
Polychlorinated Biphenyls A A A A A A A C C C C C C C
Potash, Potassium Carbonate A A A A A A A A A A A A A A
Potassium Acetate A A A A A A A A A A A A A A
Potassium Bichromate A A A A A A C A B A A B B A
Potassium Chromate, Red A A A A A A C A B A A B B A
Potassium Cyanide A A A A A A A A A A A A A A
Potassium Dichromate A A A A A A C A B A A B B A
Potassium, Elemental C C C C C C C C C C C C C C
Potassium Hydroxide C B A6 C A6 A11 A6 C C C C C C C
Potassium Nitrate A A A A A A U B B B B B B B
Potassium Permanganate A A A A A A U B U B B U B B
Potassium Sulfate A A A A A A A A A A A A A A
Producer Gas A A A A A A A A C B A C B C
Propane A A A A A A A A C B A C B C
1,3-Propane Sultone A A A U U A A U U U U U U U
Beta-Propiolactone A A A A A A A C C C C C C B
Propionaldehyde A A A A A A A C C C C C U U
Propoxur (Baygon) A A A A A A A C C C C C U U
Propyl Alcohol A A A A A A A A A A A A A A
Propyl Nitrate A A A A A A A C C C C C C C
Propylene A A A A A A A C C C C C C C
Propylene Dichloride A A A A A A A C C C C C C C
Propylene Glycol A A A A A A A A A A A A A
Propylene Oxide A A A A A A A C C C C C C B
1,2-Propylenimine U U A U U A A C C C C C C C
Prussic Acid, Hydrocyanic Acid A A A A A A A A B A A B B A
Pyridine A A A B B A A C C C C C C B
Quinoline A A A B B A A C C C C C C C
Quinone A A A A A A U U U U U U U U
Refrigerants R 10 A A A B B A A C C C C C C C
R 11 A A A A A A A A C B A C C C
R 12 A A A A A A A A A B A A A A
R 13 A A A A A A A A A B A A A A
R 13B1 A A A A A A A A A B A A A A
R 21 A A A A A A A C C C C C A C
R 22 A A A A A A A B B B B B A A
R 23 A A A A A A A C A C C A A A
R 31 A A A A A A A C A C C A A A
R 32 A A A A A A A A A B A A A A
R 112 A A A A A A A A C B A C A C
R 113 A A A A A A A A A B A A A C
R 114 A A A A A A A A A B A A A A
R 114B2 A A A A A A A A C B A C A C
R 115 A A A A A A A A A B A A A A
R 123 A A A A A A A C3 C C3 C3 C A3 C
R 124 A A A A A A A C A C C A A A
R 125 A A A A A A A U A U U A A A
R 134a A A A A A A A B A B B A A A
R 141b A A A A A A A A U B A U A U
R 142b A A A A A A A A A B A A A A
R 143a A A A A A A A U A U U A A A
R 152a A A A A A A A A A B A A A A
R 218 A A A A A A A A A B A A A A
R 290 (Propane) A A A A A A A A C B A C B C
R 500 A A A A A A A A U B A U A U
R 502 A A A A A A A A A B A A A U
R 503 A A A A A A A C A C C A A A
R 507 A A A A A A A B C B A A
R 717 (Ammonia) A A A A A A A B C B A A
R 744 (Carbon Dioxide) A A A A A A A A A A A A A A
C316 A A A A A A A A A B A A A A
C318 A A A A A A A A A B A A A A
HP62 A A A A A A A A U B A U A U
HP80 A A A A A A A U U U U U A U
HP81 A A A A A A A U U U U U A U
Salt Water A A A B B A A A A A A A A A
Saltpeter, Potassium Nitrate A A A A A A U B B B B B B B
2,4-D Salts and Esters A A A U U A A C C C C C C C
Sewage A A A A A A A A B A A B B B
Silver Nitrate A A A A A A U B A B B A A A
Skydrols A A A A A A A C C C C C C B
Soap Solutions A A A A A A A A A A A A A A
Soda Ash, Sodium Carbonate A A A A A A A A A A A A A A
Sodium Bicarbonate, Baking Soda A A A A A A A A A A A A A A
Sodium Bisulfate (Dry) A A A A A A A A A A A A A A
Sodium Bisulfite A A A B B A A A A A A A A A
Sodium Chlorate A A A A A A A C U C C U C C
Sodium Chloride A A A B B A A A A A A A A A
Sodium Cyanide C C A C C A A C C C C C C C
Sodium, Elemental C C C C C C C C C C C C C C
Sodium Hydroxide C B A6 C A6 A11 A6 C C C C C C C
Sodium Hypochlorite A A A B B A U C U C C U C C
Sodium Metaborate Peroxyhydrate A A A B B A C B B B B B B B
Sodium Metaphosphate B A A B A A A A A A A A A A
Sodium Nitrate A A A A A A U B B B B B B B
Sodium Perborate A A A B B A C B B B B B B B
Sodium Peroxide A A A A A A C C C C C C C C
Sodium Phosphate, Monobasic A A A A A A A B B B B B B B
Sodium Phosphate, Dibasic B B A B A A A B B B B B B B
Sodium Phosphate, Tribasic C B A C A A A C C C C C C C
Sodium Silicate B B A B A A A B B B B B B B
4 Sodium Sulfate A A A A A A A A A A A A A A
Sodium Sulfide A A A A A A A A A A A A A A
Sodium Superoxide A A A A A A C C C C C C C C
Sodium Thiosulfate, ‘Hypo’ A A A A A A A A A A A A A A
Soybean Oil 10 A A A A A A A A C A A C B B
Stannic Chloride A A A C C A A B B B B B U B
Steam, Saturated, to 150 psig12 A A A A A A A A12 A12 A12 B9 B9 B9 B9
Steam, Superheated U U U U U U U C C A C C C C
Stearic Acid A A A A A A A A A A A A A A
Stoddard Solvent A A A A A A A A C A A C B C
Styrene A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Styrene Oxide A A A A A A A C C C C C C C
Sulfur Chloride A A A C C A A C C C C C C C
Sulfur Dioxide A A A A A A A C C C C C C B
Sulfur, Molten A A A A A A A C C C C C B C
Sulfur Trioxide, Dry A A A A A A U C C C C C C C
Sulfur Trioxide, Wet A A A B B A B C C C C C C C
Sulfuric Acid, 10%, 150°F and below A A A B B A U C C C C C C C
Sulfuric Acid, 10%, Above 150°F A A A C C A U U C U U C C C
Sulfuric Acid, 10-75%, 500°F and below A A A C C A U U C U U C C C
Sulfuric Acid, 75-98%, 150°F and below A A B C C A C C C C C C C C
Sulfuric Acid, 75-98%, 150°F to 500°F A B B C C A C C C C C C C C
Sulfuric Acid, Fuming A U C C C A C C C C C C C C
Sulfurous Acid A A A B B A U B B B B B U U
Syltherm 800 A A A A A A A B B B B B B B
Syltherm XLT A A A A A A A B B B B B B B
Tannic Acid A A A U8 U8 A A A A A A A A A
Tar A A A A A A A C A A A C B C
Tartaric Acid A A A A A A A A A A A A A A
2,3,7,8-TCDB-p-Dioxin A A A U U A A C C C C C C C
Tertiary Butyl Amine A A A A A A A B U B B U C B
Tetrabromoethane A A A A A A A C C C C C C C
Tetrachlorethane A A A A A A A C C C C C C C
Tetrachloroethylene A A A A A A A C C C C C C C
Tetrahydrofuran, THF A A A A A A A C C C C C C C
Therminol 44 A A A A A A A C C C C C C C
Therminol 55 A A A A A A A C C C C C C C
Therminol 59 A A A A A A A C C C C C C C
Therminol 60 A A A A A A A C C C C C C C
Therminol 66 A A A A A A A C C C C C C C
Therminol 75 A A A A A A A C C C C C C C
Therminol D12 A A A A A A A B C B B C B C
Therminol LT A A A A A A A C C C C C C C
Therminol VP-1 A A A A A A A C C C C C C C
Therminol XP A A A A A A A A C A A C B C
Thionyl Chloride A A A C C A A C C C C C C C
Titanium Sulfate A A A A A A A C C C C C C C
Titanium Tetrachloride A A A C C A A B C B C C C C
Toluene A A A A A A A C C C C C C C
2,4-Toluenediamine A A A A A A A U C U U C C C
2,4-Toluenediisocyanate A A A U U A A C C C C C C B
Toluene Sulfonic Acid A A A U U A A C C C C C C C
o-Toluidine A A A A A A A C C C C C C C
Toxaphine A A A U U A A C C C C C C C
Transformer Oil (Mineral Type) A A A A A A A A C A A C B C
Transmission Fluid A A A A A A A A A C A A C B C
Trichloroacetic Acid A A A C C A A C C C C C C C
1,2,4- Trichlorobenzene A A A A A A A C C C C C C C
1,1,2-Trichloroethane A A A A A A A C C C C C C C
Trichloroethylene A A A A A A A C C C C C C C
2,4,5-Trichlorophenol A A A U U A A C C C C C C C
2,4,6-Trichlorophenol A A A U U A A C C C C C C C
Tricresylphosphate A A A A A A A C C C C C C B
Triethanolamine A A A U U A A B B B B B B B
Triethyl Aluminum A A A U U A A C U C C U C U
Triethylamine A A A A A A A B B B B B B A
Trifluralin A A A A A A A C C C C C C C
2,2,4-Trimethylpentane A A A A A A A A C A A C B C
Tung Oil A A A A A A A A C A A C B C
Turpentine A A A A A A A A C A A C C C
UCON Heat Transfer Fluid 500 A A A A A A A A B A A B B B
UCON Process Fluid WS A A A A A A A A B A A B B B
Urea, 150ºF and below A A A A A A A B U U B U A A
Urea, above 150ºF A A A A A A A U U U U U U U
Varnish A A A A A A A B C B B C C C
Vegetable Oil 10 A A A A A A A A C A A C B B
Vinegar 10 A A A A A A A B B B B B A A
Vinyl Acetate A1 A1 A1 A1 A1 A1 A1 B1 C B1 B1 C B1 B1
Vinyl Bromide A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Vinyl Chloride A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Vinylidene Chloride A1 A1 A1 A1 A1 A1 A1 C C C C C C C
Vinyl Methacrylate A A A A A A A C C C C C C C
Water, Acid Mine, with Oxidizing Salt A A A C C A U B U B B U B U
Water, Acid Mine, No Oxidizing Salts A A A A A A A A U A A U B A
Water, Distilled A A A A A A A A A A A A A A
Water, Return Condensate A A A A A A A A A A A U U A
Water, Seawater A A A B B A A A A A A A A A
Water, Tap A A A A A A A A A A A A A A
Whiskey and Wines 10 A A A A A A A A A A A A A A
Wood Alcohol A A A A A A A A A A A A A A
Xceltherm 550 A A A A A A A B C B B C B C
Xceltherm 600 A A A A A A A A C A A C B C
Xceltherm MK1 A A A A A A A C C C C C C C
Xceltyherm XT A A A A A A A C C C C C C C
Xylene A A A A A A A C C C C C C C
Zinc Chloride A A A B B A A A A A A A A A
Zinc Sulfate A A A A A A A A A A A A A A
1. Consult the factory regarding your specific applications. See “Monomers” in Gasketing catalog Terms section.
2. IFG® Style 5507 is rated “B”.
3. There have been conflicting field reports concerning the suitability of NBRand neoprene bound gaskets in 123. End users should take note.
4. IFG® Style 5507 is rated “A”.
5. Some chromium plating baths contain fluorides that can attack silica and silicate type fillers in some GYLON® styles. If the bath is known to contain little or no fluoride, all GYLON® styles should be suitable for use.
6. These GYLON® styles can be expected to be suitable to 60% concentration at temperatures up to 250°F (121°C).
7. Use GYLON® styles 3502, 3503, 3505, 3562, 3563. These styles arespecially processed, cleaned and packaged for oxygen service.
8. This GYLON® contains a stainless steel insert. There is a possibility that this might contribute traces of iron to form iron tannates, resulting in undesirable color in the tannic acid.
9. These styles are not preferred choices for steam service, but are successful when adequately compressed.
10. If a gasketing material that conforms to FDA requirements is desired, contact factory for specific recommendations.
11. These GYLON® gasket styles can be expected to be suitable to 75% concentration at temperatures up to 400°F (204°C).
12. Minimum recommended assembly stress = 4,800psi.
Preferred assembly stress = 6,000-10,000psi. Gasket thickness of 1/16″ strongly preferred.
For saturated steam above 150psig, consult Garlock Engineering.
13. Some detergent solutions are strongly alkaline and/or may contain bleach. Please contact Applications Engineering.
14. Gylon 3545 is suitable for up to 200°F wet or dry fluorine gas. Above this please consult Applications Engineering.
15. If lead chromate is also present please consult Applications Engineering.
15. If lead chromate is present, please contact Applications Engineer

What is PTFE Joint Sealant?

What is PTFE (Teflon) joint sealant

What is What is PTFE (Teflon) Joint Sealant?

PTFE (polytetrafluoroethylene) or Teflon® joint sealant is a fluid sealing product that offers many advantages of traditional gasketing.

How it works?

PTFE joint sealant comes on a spool.   It’s known as “form-in-place” gasket, because the material is applied directly to surface that needs to be sealed, rather than cut to shape from a sheet before hand.  Before it is compressed, the joint sealant is soft. This allows it to conform to and seal very rough or serrated surfaces. After compression is applied, however,  it forms a thin, hard ribbon that fills in surface irregularities and creates an extremely tight seal.

What are the advantages of PTFE Joint Sealant?

  1. Form in place: Because the joint sealant can be applied to any shape surface, this makes it an extraordinarily versatile. There’s no need to stock multiple gasket sizes, all you really need is joint sealant and knife to cut it. This also provides advantages for large and irregularly shaped gaskets, where storage, measurement, and gasket sheet sizing can all become issues.
  2. The PTFE itself: PTFE is an offers amazing chemical resistance. W.L. Gore, manufacturer of Gore GR® joint sealant, states, “PTFE is chemically resistant to virtually all industrial chemicals.” It’s able to withstand high temperature and pressure ranges as well. Because it is fairy soft before compression, it is able to conform to a wide variety of surfaces.
  3. Some Brands are FDA Approved: Some brands of PTFE joint sealant are FDA Approved for incdiental food contact. The PTFE is approved under 21 CFR 177.1550 and the adhesive under 21 CFR 175.105. Although most brands are nearly identical chemically, some brands (for example Gore and Produra) have chosen to forego the FDA approval process.

What are the disadvantages of PTFE Joint Sealant?

  1. Price: PTFE Joint Sealant is not the most economical solution for many sealing solutions. For applications where standard gaskets will work or chemical resistance is not important, cheaper cut gaskets exist.

How to Chose the Right Size PTFE Joint Sealant

Coming soon

PTFE Joint Sealant Material Specs

PTFE Joint Sealant material specifications

Equalseal EQ-535 PTFE Joint Sealan
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