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Has excellent resistance to petroleum oils and gasolines. Resistance to aliphatic hydrocarbons, acids and bases is good. The temperature range is -40˚F to +212˚F, intermittent to +230˚F. Excellent resistance to permanent compression. It does not possess good resistance to ozone, sunlight or weather. Also available in an FDA compound.

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Neoprene has good resistance to oils, sunlight and aging. Temperature range is -40˚F to +230˚F, intermittent to +250˚F. Resistance to compression set is good. Chemical resistance to silicone oil and grease, refrigerants, ammonia and carbon dioxide. Also available in an FDA compound.

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Silicone retains good elastomeric properties at both low and high temperatures. Should not be exposed to fuels, solvents or silicone fluids. Silicone has excellent resistance to ozone, aging and weather. Serviceable temperature range from -67˚F to +400˚F, intermittent to +450˚F. Also available in an FDA compound.

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EPDM combines excellent resistance to deteriorative effects of ozone, oxygen, weather, heat and many chemicals. Its serviceable temperature range is -40˚F to +250˚F and intermittent to +275˚F. It is not recommended for use in contact with petroleum oils or fluids. Also available in an FDA compound.

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Viton® has excellent resistance to high temperatures, ozone, oxygen, fuels, mineral oil and synthetic hydraulic fluids. Maximum operating temperatures run from 400˚F in continuous service up to 500˚F in intermittent service. Also available in an FDA compound.

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Polyurethane elastomers, as a class, have excellent wear resistance and high tensile strength, along with excellent ozone and oxidation resistance.

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Crude natural rubber is found in the juices of many plants, including the shrub guayule, Russian dandelion, goldenrod and dozens of other shrubs, vines and trees. The principal source is the tree Hevea Brasiliensis which is native to Brazil. Natural rubber has high resilience, good tensile strength and good tear resistance. It does not perform well when exposed to chemicals and petroleum derivatives. Natural rubber is inferior to many of the synthetics in heat aging, resistance to sunlight, oxygen, ozone, solvents and oils. The temperature range is -55˚C to +55˚C (-67˚F to +122˚F).

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SBR is a copolymer of styrene and butadiene and has properties similar to natural rubber. It has greater abrasion resistance than natural rubber, better wear resistance and better low temperature flexibility. Though superior in water resistance to natural rubber, it has about the same resistance to solvents and chemicals. It has better heat resistance and heat aging qualities than natural rubber, and in excess heat it hardens and becomes brittle instead of softening as does natural rubber. Resistance to sunlight and ozone is similar to natural rubber. The temperature range of SBR is -55˚C to +70˚C (-67˚F to +158˚F). SBR rubber is available in sheet material, but we do not carry it in cord stock.

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Butyl rubber is a copolymer of isobutylene and isoprene. It has exceptionally low gas and moisture permeability and outstanding resistance to heat aging, weather, ozone, chemical attack, flexing, abrasion and tearing. It has good resistance to phosphate ester based hydraulic fluids, and has excellent electrical isolation performance. Butyl is not recommended for use when in contact with petroleum oils and fluids. The temperature range is -55˚C to +120˚C (-67˚F to +248˚F). We carry only in sheet material.

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When parts are fabricated from PTFE (polytetrafluroethylene) the exceptional chemical, electrical, mechanical and thermal properties become apparent. PTFE properties include: extreme corrosion resistance, excellent weathering, nonflammable, very low frictional coefficient, no-adhesive, high heat resistance, and surface resistivity, FDA compliant, USDA approved. The working temperature range for PTFE is -200˚C to +260˚C (-328˚F to +500˚F).

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Vegetable fiber & vegetable fiber with cork gasket papers are produced from a strong and flexible high grade plant fiber impregnated with protein and glycerin binders. Used in industrial, chemical, petroleum and automotive applications, vegetable fibers offer good sealability and excellent conformability to compensate for flange distortion. Material is chemically treated to resist tars, oils, water, grease, air, gasoline and solvents. It remains compressible under heavy pressure and has a temperature limitation of +250˚F.

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Compressed asbestos-free sheet is constructed with synthetic fiber, fillers and elastomeric binders which provide chemical stability, sealability and heat resistance. Various styles are available which offer excellent resistance to various oils, water, gasoline, mild chemicals, hydrocarbons, refrigerants, steam and other inert gasses. A good general purpose material with a Buna (nitrile) binder carries a temperature range of -40˚F to +400˚F constant operating temperature (maximum spike +700˚F).

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Acco-pak style synthetic gasket materials are produced from various fibers and rubber binders to produce economical materials suitable for a wide variety of applications where good tensile strength, low creep relaxation, high pressure resistance and excellent fuel or oil resistance are required. These materials are designed for use in higher temperature applications carrying maximum operating temperatures ranging from +350˚F to +750˚F.