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Home , Butyl rubber, Nitrile rubber, Silicone rubber, Synthetic rubber

Piston Seals Wipers O-Rings & Kits Custom Parts Specialty Parts Services Wear Guides Rod Seals Rubber Compounds QUALITY | VALUE | SERVICE Rubber Compounds Rubber Where rubber compounds abound. Why make the rounds searching for rubber compounds when they’re all right here in one convenient place? All Seals has developed nearly 500 different rubber compounds, in a variety of materials and hardnesses, to satisfy virtually every conceivable requirement. And if your application requires unique properties and/or capabilities, we’ll develop a compound for you! This brochure describes the most commonly specified rubber compounds. As such, the information presented here is necessarily general in nature and abbreviated. For more specific information or expert advice, contact us and speak directly to an experienced compound professional. Please call us at 800.553.5054, or visit our website at www.allsealsinc.com.

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AFLAS® CARBOXYLATED (TFE/P, FEPM) (IIR) (XNBR) Aflas® or TFE/P is a member of a recent generation of fluoroelastomers Butyl is a specialty rubber more frequently specified for its physical Carboxylated nitrile, or XNBR, is produced by adding a carboxylic acid formulated specially to provide unique properties for specific applications. properties than chemical resistance. It has excellent shock absorption side group to , thereby adding more crosslinking sites than The primary uses for Aflas® are in the oil/gas, chemical processing, and vibration damping capabilities, as well as good electrical properties. traditional NBR. As a result, solvent swell and abrasion resistance are pharmaceutical and automotive industries. It can be crosslinked (cured) Butyl’s unusually low gas permeability makes it ideal for vacuum significantly improved, as well as modulus, tensile strength and tear using a variety of systems, but generally peroxides are used to provide applications, while its high degree of saturation makes it inherently resistance. Accordingly, XNBR is frequently specified in dynamic applications the best all-around environmental resistance. A unique property of TFE/P resistant to atmospheric elements such as and UV radiation. such as rod seals and wipers. Water resistance, resilience and some low is, that at very low temperatures (down to -65°F), it takes on leathery Additionally, butyl is thermally stable when cured with phenol- temperature properties are somewhat diminished. consistency and remains functional, unlike many other rubbers, which formaldehyde resins, and has a relatively high coefficient of friction. can often become brittle and shatter. Composition: Composition: Medium density terpolymer of , , and a Composition: Medium density of isobutylene and a small amount of isoprene. containing carboxylic acid.. Medium density copolymer of tetrafluoroethylene and propylene. Physical Properties:* Poor Fair Good Excellent Physical Properties:* Poor Fair Good Excellent Physical Properties:* Poor Fair Good Excellent Tensile strength • Tensile strength • Tensile strength • Elongation • Elongation • Elongation • Cold resistance • Cold resistance • Cold resistance • Compression set • Compression set • Compression set • Tear resistance • Tear resistance • Tear resistance • Abrasion resistance • Abrasion resistance • Abrasion resistance • Flame resistance • Flame resistance • Flame resistance • Gas permeability • Gas permeability • Gas permeability • Chemical Resistance:* Poor Fair Good Excellent Chemical Resistance:* Poor Fair Good Excellent Chemical Resistance:* Poor Fair Good Excellent Ozone • oils and • Concentrated bases • Weather • • Dilute acids and bases • Ketones • LP Gas • Ozone • Silicone fluids • Solvents • Weather • Petroleum oils and fuels • Oxidation •

Steam • Dilute acids and bases • Operating Temperature:** Radiation • Water • -65° to +250°F Phophate esters • Steam • Oxidation • Weather • Sour Oil & Gas • • Ethers • Esters • Alipathic hydrocarbons • Ethers • Aromatic hyrdrocarbons • Ketones • Operating Temperature:** -10° to +250°F Operating Temperature:** +15° to +400°F RUBBER ETHYLENE PROPYLENE RUBBER FLUOROCARBON RUBBER (CR, polychloroprene, ) (EPDM, EPT, Nordel IP®, Keltan®) (FKM, FPM, VitonTM, Dai-El®, Tecnoflon®) Chloroprene (commonly known as “neoprene”) is one of the oldest Ethylene-Propylene rubber is a low cost, versatile compound that functions Fluorocarbon (or FKM) rubber is a widely used, premium grade compound synthetic . Introduced in 1931, it is used in a variety of well in both low and high operating temperature environments. Moderate especially well suited to applications where prolonged exposure to petroleum applications due to its ability to resist both oils and oxidation. The oil to good resistance to a variety of chemicals make it the compound of oils at high operating temperatures is encountered. Such properties make resistance, however, depends significantly on the type of oil. Neoprene choice for a variety of applications. EPDM’s chemically saturated it especially useful in automotive “under-hood”applications. Additionally has good resistance to naphthenic and paraffinic oils of high molecular chain accounts for its superior resistance to degradation. However, use FKM is particularly resistant to swell in the highly aromatic, non-leaded, weight, but swells excessively in aromatic oils of low molecular weight. is limited by its incompatibility with petroleum based fluids. EPDM can additive loaded mandated by today’s environmental regulations. Vulcanizates of neoprene display little significant change after prolonged be cured with or peroxide, although applications with high heat Its low temperature deficiencies can be overcome somewhat by special outdoor exposure. Because of its chlorine content, flame resistance is requirements should use peroxide cured compounds. Peroxide also compounding. Fluorine content is generally in the 66% to 70% range. superior to that of most other rubbers, and its high structural regularity produces vulcanizates with superior compression set than that of the Fluorocarbon rubber is exceptionally resistant to embrittlement when displays strain induced crystallization resulting in high tensile strength. sulfur cures. Reinforcing agents are especially important in ethylene- exposed to high heat over long periods of time; it is considered to be Neoprene is also especially well-suited for rubber-to-metal bonding propylene because they lack gum strength. Therefore, high serviceable indefinitely when exposed continuously to 400°F dry heat. The

tensile and tear properties are achieved through high loading. EPDM is a cure system of choice for most fluorocarbon compounds is bisphenol, as Composition: terpolymer, not to be confused with the copolymer EPM, which can only it provides the best combination of compression set and improved steam Produced from the chloroprene monomer, a combination of chlorine and be peroxide cured, due to its highly saturated polymer backbone. and acid resistance. Diamine and peroxide cure systems can also be employed. butadiene. Medium density. Fluorocarbon vulcanizates are very resistant to ozone and atmospheric aging. Composition: Physical Properties:* Poor Fair Good Excellent Low density terpolymer of ethylene, propylene, and a small amount of a diene. Composition: Tensile strength • High density copolymer of vinylidene and hexafluoropropylene. Elongation • Physical Properties:* Poor Fair Good Excellent Cold resistance • Tensile strength • Physical Properties:* Poor Fair Good Excellent Compression set • Elongation • Tensile strength • Tear resistance • Cold resistance • Elongation • Abrasion resistance • Compression set • Cold resistance • Flame resistance • Tear resistance • Compression set • Gas permeability • Abrasion resistance • Tear resistance • Flame resistance • Abrasion resistance • Chemical Resistance:* Poor Fair Good Excellent Gas permeability • Flame resistance • Ozone • Gas permeability • Weather • Chemical Resistance:* Poor Fair Good Excellent Dilute acids • Ozone • Chemical Resistance:* Poor Fair Good Excellent Dilute alkalis • Weather • Ozone • Refrigerants • Water • Weather • Water • Steam • Water • Steam • Dilute acids • Dilute acids • Aromatic & oxygenated solvents • Dilute alkalis • Dilute alkalis • Oxygenated solvents • Petroleum oils • Operating Temperature:** Alcohols • Solvents • -40° to +225°F Gasoline • Steam • Petroleum oils and greases • Ketones • Anhydrous • ETHYLENE ACRYLIC RUBBER Operating Temperature:** (AEM, Vamac®) -60° to +250°F Operating Temperature:** Ethylene acrylic, or AEM rubber is generally used in applications requiring -15° to +400°F a tough rubber that combines good oil resistance, with heat resistance greater than nitrile or neoprene, and at a cost well below that of many silicone or fluorocarbon rubbers. Good low temperature properties are FLUOROSILICONE RUBBER imparted by the ethylene content, while the acrylate provides a considerable (FVMQ, Silastic FSR®, FSE®) degree of oil resistance. Ethylene acrylic rubber is highly saturated, and Fluorosilicone rubber is an inorganic “hybrid” which combines the as a result exhibits excellent resistance to ozone and weathering. wide temperature range spectrum of silicone with some of the chemical Ethylene acrylic compounds are also well suited for applications requiring resistance of fluorocarbon rubber, accomplished by the addition of fluorine to continuous exposure to hot (300°F) aliphatic hydrocarbons, including the alkyl groups of silicone elastomers. Primary use is in delivery systems. most common automotive lubricants and hydraulic fluids. Water and Fluorosilicone rubber offers the best low temperature properties of any oil ethylene glycol resistance is good, but softening can occur after long resistant rubber. Like all compounds based on , fluorosilicones term exposure above 200°F. AEM’s good damping characteristics make have relatively low tear strength, abrasion resistance, and tensile strength, it well suited for vibration mounts, pads, and isolators. and therefore are generally not suitable for dynamic applications.

Composition: Composition: Medium density copolymer of ethylene and methyl acrylate. May also Low density fluorinated silicone rubber. contain a small amount of a third monomer containing carboxylic acid to provide active cure sites in the polymer chain. Physical Properties:* Poor Fair Good Excellent

Tensile strength • Physical Properties:* Poor Fair Good Excellent Elongation • Tensile strength • Cold resistance • Elongation • Compression set • Cold resistance • Tear resistance • Compression set • Abrasion resistance • Tear resistance • Flame resistance • Abrasion resistance • Gas permeability • Flame resistance • Gas permeability • Chemical Resistance:* Poor Fair Good Excellent

Ozone • Chemical Resistance:* Poor Fair Good Excellent Weather • Ozone • Water • Weather • Dilute acids • Petroleum oils • Dilute alkalis • Automatic transmission fluid • Silicone oils • Water • Hydrocarbon fuels • Dilute acids • Petroleum oils • Dilute alkalis • Refrigerants • Steam • Steam • Operating Temperature:** Ketones •

-30° to +300°F Operating Temperature:** -70° to +400°F HIGHLY SATURATED NITRILE NITRILE RUBBER POLYACRYLATE RUBBER (HNBR, HSN, NBM, Therban®, Zetpol®) (NBR, Buna N, Paracril®, Nipol®) (ACM, polyacrylic rubber, Hycar®) Hydrogenation of nitrile rubber removes much of the unsaturation in the On a cost basis, nitrile rubber is the least expensive of the oil resistant Polyacrylate rubber, or ACM, is a specialty rubber whose primary strength is its nitrile polymer chain to make it far less vulnerable to attack by heat, elastomers. As a result, nitrile is the one of the most widely used rubber ability to withstand high heat while retaining oil resistance. It is often the material ozone, and . In fact, due to superior oil and temperature resistance, materials, due to its combination of low cost, resistance to many of choice for applications that involve sulfur bearing lubricants, which are finding highly saturated nitrile can sometimes be substituted for more costly chemicals, and good physical properties. The acrylonitrile content of increased usage in automotive applications, especially transmission seals. From fluorocarbon rubber. It is frequently used in automotive air conditioning this highly polar elastomer provides excellent oil and gas permeation a performance standpoint, ACM occupies an intermediate position between nitrile systems employing R-134a refrigerants. HNBR can be can be either resistance, which increases as the level of ACN increases. However, an and fluorocarbon. In addition, polyacrylates exhibit good damping characteristics, peroxide or sulfur cured, depending on the degree of saturation achieved increase in the acrylonitrile content compromises low temperature are not highly corrosive to steel, and can be compounded to provide excellent by the hydrogenation process, but peroxide is almost always used due flexibility, and increases compound hardness. Typical ACN content ranges flex life and some degree of flame resistance. However, this acrylic based to the good heat stability properties of the peroxide crosslinks. It can from 18% to 50%. Nitrile should not be exposed to direct sunlight or elastomer does have some limitations. Poor low temperature flexibility limits be compounded for both low and high temperature use. moderate to high levels of atmospheric ozone, as rapid deterioration will its usefulness and compression set is not as good as most other compounds.

result. However, NBR will accept many anti-degradants, most notably It is also inferior to many elastomers in tensile strength and water resistance.

Composition: PVC, which offer some degree of improvement of these deficiencies. Formed by hydrogenating the nitrile copolymer of butadiene and are usually sulfur cured, but peroxide curing is also possible, Composition: acrylonitrile. Medium density. resulting in improved compression set. Medium density acrylic ester copolymer.

Physical Properties:* Poor Fair Good Excellent Composition: Physical Properties:* Poor Fair Good Excellent Tensile strength • Medium density copolymer of butadiene and acrylonitrile. Tensile strength • Elongation • Elongation • Cold resistance • Physical Properties:* Poor Fair Good Excellent Cold resistance • Compression set • Tensile strength • Compression set • Tear resistance • Elongation • Tear resistance • Abrasion resistance • Cold resistance • Abrasion resistance • Flame resistance • Compression set • Flame resistance • Gas permeability • Tear resistance • Gas permeability • Abrasion resistance • Chemical Resistance:* Poor Fair Good Excellent Flame resistance • Chemical Resistance:* Poor Fair Good Excellent Petroleum oils • Gas permeability • Ozone • Automotive refrigerants • Weather • Automatic transmission fluid • Chemical Resistance:* Poor Fair Good Excellent Sulfur containing oils • Sour crude oil • Water • Aliphatic solvents • Oxygenated fuels • Petroleum oil • Dilute acids • Ozone • Silicone lubricants • Dilute alkalis • Weather • Dilute acids • Water • Dilute alkalis • Steam • Operating Temperature:** Hydraulic fluids • -25° to +300°F Transmission fluid • Operating Temperature:** Steam • -0° to +350°F Ozone • Weather • (NR, Hevea) Ketones • ® Natural rubber, or NR, was the first commercially viable elastomer ever Strong acids • (AU, EU, PU, Millathane ) developed, and is still the only non- in widespread use. Polyurethane rubber is notable for its combination of hardness with elasticity, • In fact, natural rubber currently accounts for almost 40% of the world’s and outstanding abrasion resistance and tear strength. Elastomeric urethane elastomer consumption, as it is frequently blended with other rubbers Operating Temperature:** rubber, not to be confused with thermoplastic polyurethane, may be formulated to derive an ideal combination of properties, especially in automotive from either an ester (AU) or ether (EU) base; it is often referred to as “millable -30° to +250°F production. Derived from a liquid of the Hevea tree, NR latex is a low cost gum” urethane. The ester based polymer is superior in resistance to abrasion material that, when processed into dry rubber, exhibits excellent physical and heat but tends to be hygroscopic, while the ether based polymer has better properties due to its high structural regularity. It is ideal for applications flexibility at low temperatures. Polyurethane is a rather expensive material that require good resistance to abrasion, gouging and cut growth. Also, PERFLOUROELASTOMER whose use is usually limited to applications that require a combination of its because it experiences little heat buildup during flexing, it is also commonly (FFKM, Kalrez®, Chemraz®) outstanding physical properties. Common end use applications are industrial specified when shock and dynamic load requirements are deemed critical. FFKM combines the outstanding chemical resistance of PFTE with the rolls, O-Rings, caster wheels, , shoe soles and conveyor belts. Peroxide Natural rubber is tough, long lasting and can be compounded for service elastomeric properties of fluorocarbon rubber; it is virtually impervious is the most commonly employed cure system, but sulfur curing is also possible at temperatures as low as -65°F. It is also easily bonded to metal to 1500+ different chemicals. There are several different grades of in the extremely complex chemistry involved in . and fabrics. FFKM, but all contain fully fluorinated polymer chains and hence offer the ultimate performance of elastomers when considering heat and Composition: Composition: chemical resistance. FFKM is the compound of choice in aggressive Low to medium density polyurethane diisocyanate. Coagulated, dried rubber derived from the latex of the Hevea Brasiliensis process environments, such as chemical and hydrocarbon plants, tree. Low to medium density. where no other elastomer can withstand the highly corrosive fluids Physical Properties:* Poor Fair Good Excellent likely to be encountered. Other uses can be found in the semiconductor, Tensile strength • Physical Properties:* Poor Fair Good Excellent aerospace,and pharmaceutical industries, in part due to FFKM’s superior Elongation • resistance to outgassing. Tensile strength • Cold resistance • Elongation • Composition: Compression set • Cold resistance • High density copolymer of tetrafluoroethylene and a perfluorinated ether. Tear resistance • Compression set • Abrasion resistance • Tear resistance • Physical Properties:* Poor Fair Good Excellent Flame resistance • Abrasion resistance • Tensile strength • Gas permeability • Flame resistance • Elongation • Gas permeability • Cold resistance • Chemical Resistance:* Poor Fair Good Excellent Compression set • Ozone • Chemical Resistance:* Poor Fair Good Excellent Tear resistance • Weather • Water • Abrasion resistance • Oxidation • Air • Flame resistance • Silicone oils • Oxidation • Gas permeability • Sunlight • Alcohol • Air • Dilute acids and bases • Chemical Resistance:* Poor Fair Good Excellent Alcohols • Steam • Resistant to most chemicals • Mineral oil • Radiation • Ozone • Ethers • Oil • Fluorinated refrigerants • LP gas •

Gasoline • Ketones • Operating Temperature:** Hydrocarbon solvents • Steam • -10° to +500°F Sunlight • Aldehydes • Ozone • Concentrated acids • Concentrated bases • Operating Temperature:** -60° to +225°F Operating Temperature:** -40° to +180°F PTFE STYRENE-BUTADIENE RUBBER VITONTM ETP (Teflon®, Polyflon®) (SBR, GRS, Buna-S) (VitonTM Extreme) PTFE is not a rubber compound, but a white thermoplastic resin which can Styrene-Butadiene rubber is much like natural rubber in many of its VitonTM ETP, or VitonTM Extreme, is resistant to the same fluids as other be formed into various shapes by either machining or molding. It is a premium properties, and is one of the lowest cost and highest volume elastomers high fluorine FKMs such as aliphatic and aromatic hydrocarbons, hydraulic grade material, which is often specified in harsh chemical environments available. Although its physical properties are somewhat less than natural fluids, motor oils, fuels, etc. However it is also resistant to all types of where no rubber material is suitable, as it is impervious to virtually all rubber, SBR is tougher, and slightly more resistant to heat and flex alcohols, steam, strong bases, and polar fluids such as potassium hydroxide, fluids and gases. PTFE exhibits very low moisture absorption, and can cracking. Much of its usage is in tire treads, especially blended with other ketones, MTBE and complex solvent mixtures. In fact, VitonTM ETP has the withstand extreme high and low temperatures. It also provides the lowest polymers. It can readily be substituted for natural rubber in many other broadest fluid resistance of any FKM polymer on the market, making it coefficient of friction of any seal material. One major drawback to using applications, thereby achieving significant cost savings. SBR is sometimes ideal for severe service environments. Although costly, it can frequently PTFE is a tendency to deformation under a continuous load, a phenomenon referred to as “GRS” or Government Rubber-Styrene, as its development be substituted for far more expensive perfluoroelastomers, at a fraction commonly known as “creep” or cold flow. Loading PTFE with fillers such began as a wartime emergency, necessitated by an interrupted supply of of the cost. as bronze, graphite, glass, or molybdenum disulfide can counteract this natural rubber. SBR is actually a generic term covering a wide variety of behavior substantially. PTFE also has relatively poor elasticity compared synthetic rubbers differing not only in the styrene-butadiene ratio, but Composition: to other sealing materials. In addition to solid PTFE, RT Dygert also offers also in the type of polymerization by which they are made. High density terpolymer of ethylene, tetrafluoroethylene, and

“CHEM-RINGS”, which are Teflon® encapsulated O-Rings, with a silicone perfluoromethyl vinyl ether or VitonTM core, and normally covered with a FEP outer jacket. Composition:

Low density copolymer of styrene and butadiene. Physical Properties:* Poor Fair Good Excellent Composition: Tensile strength • Fluorocarbon resin generically known as polytetrafluoroethylene Physical Properties:* Poor Fair Good Excellent Tensile strength • Elongation • Physical Properties:* Poor Fair Good Excellent Elongation • Cold resistance • Tensile strength • Cold resistance • Compression set • Elongation • Compression set • Tear resistance • Cold resistance • Tear resistance • Abrasion resistance • Compression set • Abrasion resistance • Flame resistance • Tear resistance • Gas permeability • Flame resistance • Abrasion resistance • Gas permeability • Chemical Resistance:* Poor Fair Good Excellent Flame resistance • Concentrated bases • Gas permeability • Chemical Resistance:* Poor Fair Good Excellent Oxidation • Amines • Chemical Resistance:* Poor Fair Good Excellent Alcohols • Polar solvents • Impervious to most chemicals • Water • Nitric acids •

Glycol • Toluene • Operating Temperature:** Acetone • KOH • -300° to +500°F Steam • • Acetic acid (30%) • Acetone • Weather • Air • Butyl acetate • SILICONE RUBBER • (VMQ, Silastic HCR®, Elastosil®) Ozone • Silicone is an inorganic rubber with an ability to retain its physical properties Diester oils • Ethylene diamine • at higher temperatures than most other rubber materials. It is also flexible Mineral oils • Water • at very low temperatures; however its relatively poor tensile, tear strength Silicone oils • and abrasion resistance limits use to static applications. These weaknesses Operating Temperature:** can be improved somewhat by reinforcement with fine, high surface area Operating Temperature:** -10° to +400°F fillers which are compatible chemically with the silicone polymer itself. -50° to +225°F Silicone does possess extraordinary resistance to oxidation and ozone * Excellent, good, fair and poor are intended to serve as general degradation due to the absence of unsaturated double bonds in the polymer guidelines only. Actual testing in the application environment is backbone. Since it is fully saturated, only peroxides can be used for always recommended. hot vulcanization processes. Resistance of silicone vulcanizates to gas ** Operating temperature ranges are approximate and apply to medium permeation is generally considered to be poor, as much as 100 times hardness (~70 Shore A) compounds. Harder or softer compounds will greater than nitrile or butyl, but it is frequently specified in food and have different temperature ranges. beverage applications, as it imparts little taste or odor. ® Registered Trademarks Composition: AGC Chemicals: Aflas®; Daikin: Dai-El®, Polyflon®; Dow Corning: Medium density inorganic rubber consisting primarily of Silastic FSR®, Silastic HCR®; Dow Elastomers: Nordel IP®; DuPont: polymethylsiloxane and variations. Kalrez®, Teflon®, Vamac®; GreeneTweed: Chemraz®; Lanxess: Keltan®, Therban®; Momentive Performance Materials: FSE®; Physical Properties:* Poor Fair Good Excellent Lubrizol: Hycar®; RHD Polymer & Chemical: Paracril®; Tensile strength • Solvay : Tecnoflon®; TSE Industries: Millathane®; Elongation • Wacker Chemie: Elastosil®; Zeon Chemicals: Nipol®, Zetpol® Cold resistance • Viton™ is a trademark of The Chemours Company FC, LLC. Compression set • Tear resistance • Abrasion resistance • Flame resistance • Gas permeability •

Chemical Resistance:* Poor Fair Good Excellent Ozone • Weather • Dilute alkalis • Vegetable oils • Dilute acids • Water • Steam • Petroleum oils • Ketones •

Operating Temperature:** -65° to +400°F CALIFORNIA TEXAS CONTACT 20762 Linear Lane 4407 Halik Road, Building A Lake Forest, CA 92630 Pearland, TX 77581 [email protected] 800.553.5054 TOLL FREE 800.553.5054 TOLL FREE 714.556.4931 PHONE 281.404.4384 PHONE www.allsealsinc.com 714.557.3257 FAX 281.715.5379 FAX

© 2015, All Seals, Inc. Rev 12.16 WARRANTIES All Seals, Inc. warrants the products to be free of defects in materials and workmanship (as defined by the print or standard specification) for a period of ninety (90) days. Should the product(s), in All Seals’ opinion, malfunction during the warranty period, All Seals, Inc. will, at its option, repair or replace the defective product(s) at no charge provided that the product(s) have not been subjected to misuse, abuse, or non-All Seals-authorized alternations, modifications, or repairs. All Seals, Inc. provides only the warranties set forth herein. All other warranties, expressed or implied, including but not limited to the warranties of merchantability and fitness for a particular purpose, are excluded in the event the product(s) provided herein malfuction. Buyer’s sole remedy shall be repair or replacement as provided above. Under no circumstances shall All Seals, Inc. be liable in any way to the buyer or user for any damages, including any lost profits or other indirect, special, incidental or consequential damages of any kind or nature, ariisng out of use of, or inability to use such product.