Materials Information

ELASTOMER, TEMP. RANGE, GENERAL PROPERTIES

Nitrile
(BunaN) 65° to 250° F Most commonly used material for "O" Rings. Superior to most elastomers with regard to compression set or cold flow, tear and abrasion resistance.

Fluorocarbon
(Viton®, Fluorel™) 20° to 400° F Heat resistance up to 600° F depending on time and service condition.

Silicone
175° to 450° F Ozone, dry heat, high aniline oils, many oxidizing chemicals.

Ethylene Propylene
(EPR, EPDM) 65° to 300° F Phosphate ester base hydraulic fluids (Skydrol, Fyrquel, Pydraul), water, silicone oils and greases, dilute acids and alkalies, ketones (MEK, acetone), alcohols, automotive brake fluids.

Neoprene™
(Chloroprene) 65° to 300° F Limited resistance to deterioration from exposure to petroleum lubricants and oxygen.

Polyurethane
65° to 200° F Outstanding abrasion resistance. Particularly desirable in hydraulic systems where high pressures, shock loads, wide metal tolerances, or abrasive contamination is anticipated.

Teflon™
(Tetrafluoroethylene resin) 100° to 450° F Superlative electrical, chemical, temperature and friction reducing properties.

Aflas™
55° to 450°/600° F All hydraulic fluids, all brake, power and transmission fluids, acids, bases, bleaches, gamma radiation, alcohols, steam/hot water, many types of solvents.

Polyacrylate
(Cyanacryl, Hycar) 20° to 350° F Automatic transmission seals, power steering seals, power steering seals (using type A fluid), gear box seals.

Fluorosilicone
(Silastic L.S.) 80° to 350° F Petroleum oils, gasoline, jet fuel, toluene, alcohol, silicone oils.

Butyl
65° to 200° F Phosphate ester type hydraulic fluids (Skydol, Fyrquel, Pydraul), ketones (MEK, acetone), Silicone fluids & greases, water, alcohol, ammonia, hydrazine.

Hypalon®
40° to 200° F Animal fats, vegetable oils, engine coolants, freon 12, freon 22, refrigeration oils.

Polysulfide
(Thiokol) 65° to 225° F Petroleum solvents, ketones, ethers, air, water, paint & paint thinners.

Other: FDA & NSF Approved Compounds, & Kalrez®.

Viton®, Kalrez® & Hypalon® are registered trademarks of Dupont Dow Elastomers