EPDM O-Rings Washers Gaskets Seals - Ethylene Propylene

EPDM O-Rings
EPDM O-Rings

EPDM Summary:

Ethylene-Propylene rubbers make up a family of synthetic elastomers characterized by excellent chemical and thermal resistance. EPDM materials are most commonly used in applications involving solvents, acids, and other aggressive chemicals. EPDM has very poor compatibility with most mineral and petroleum based oils and is seldom used in those applications.

Recommended Use Not Recommended For Mechanical Properties
Sunlight, Ozone,  Weathering
Hot Water and Steam
Auto / Aircraft Brake Fluids
Some Acids and Bases
Ketones and Alcohols
Plumbing
Petroleum Oils
Mineral Oils
Fuels
Good Wear Resistance
Good Comp. Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance

Popular EPDM Compounds:

Hundreds more specialty compounds available. Contact a Marco Sales Consultant or Engineer for more information.

Marco Compound Number Hardness
(Shore A)
Color Low Temp.
°F (°C)
High Temp.
°F (°C)
Features
Datasheet E1000
70 Black -65 (-54) 300 (149)

Peroxide cured for improved aging, thermal and chemical stability. NSF61 complaint for drinking water applications and FDA compliant per 21 CFR 177.2600. Compare to Parker E1549-70 and Parco 5323-70.

Datasheet E1005
70 Black -65 (-54) 265 (129)

General purpose sulfur cured EPDM. Low cost compound with large stocked inventory. Alternative hardness and color options available. Compare to Parker E0603-70.

Datasheet E1055
70 Black -65 (-54) 300 (149)

General purpose peroxide cured for improved aging, thermal and chemical stability. High stocked inventory availability.

Datasheet E1069
70 Black -65 (-54) 260 (127)

NSF61 compliant for drinking water applications. Internally lubricated with Struktol.

Datasheet E1071
75 Black -45 (-43) 260 (127)

Conductive silver plated nickel filler for EMI / RFI shielding applications. Compare to Parker Chomerics E6434.

Datasheet E1074
70 Off-white -65 (-54) 300 (149)

USP Class VI, 3A-Dairy, USDA, and FDA compliant.

Datasheet E1077
75 Black -22 (-30) 212 (100)

Conductive nickel plated graphite filler for EMI / RFI shielding applications. Compare to Parker Chomerics E6306.

Datasheet E1087
80 Black -65 (-54) 300 (149)

Higher strength properties for improved service life in dynamic operation.

Datasheet E1097
70 Black -65 (-54) 300 (149)

Peroxide cured, NSF61, 3A-Dairy, USDA, and FDA compliant. Improved chloramine resistance.

Datasheet E1100
70 Tan -45 (-43) 300 (149)

Conductive silver plated aluminum filler for EMI / RFI shielding applications.

Datasheet E1118
75 Black -43 (-42) 300 (149)

Nuclear safe, improved radiation resistance, low extractables. Compare to James Walker Shieldseal 663.

Datasheet E1121
90 Black -50 (-46) 300 (149)*

Y267 cured for greatly improved steam resistance. High hardness compound with excellent Explosive Decompression (ED) resistance. Compare to Parker e0962-90.
*Steam resistance up to 600°F (315°C)

Datasheet E1130
70 Black -65 (-54) 300 (149)

NSF51 compliant for food contact.

EPDM Temperature Range:

The temperature ranges presented above are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.

EPDM Typical Applications and Products:

Ethylene-Propylene elastomers are most commonly available as EPR, a copolymer of ethylene and propylene, and EPDM, a terpolymer. EPR and EPDM have very similar properties and the abbreviations are often used interchangeably. EPDM can be cured with either Sulphur or Peroxide. Sulphur curing is less expensive and easier to process but the product may be tacky and can exhibit some bloom. Peroxide curing is more difficult to process but provides better chemical, thermal, and aging resistance.

EPDM is a versatile and relatively inexpensive material. It is often used in drinking water systems (NSF61, KTW, WRC/WRAS) due to its Chlorine and Chloramine resistance and in hydraulic and braking systems due to its excellent Glycol resistance. Other common uses include Medical and Pharmaceutical (USP class VI and ISO 10993) applications and Food and Dairy applications (NSF51 and USDA 3A). EPDM is available in o-rings, sheets, gaskets, custom molded products or extruded as solid or sponge. Hardness ranges from 40 Shore A to 90 Shore A. Special grades with military approvals are also available. EPDM has poor resistance and should not be used with most petroleum and mineral oil products. Specialty formulations with Y267 (L’Garde) cure are used in high temperature and pressure steam environments in geothermal applications.

EPDM Chemical Resistance and Compatibility:


EPDM Not Compatible With:


EPDM Compound and Product Options:

Not a complete list of offerings. Please contact a Marco Sales Consultant or Engineer to discuss additional options. See Popular Compounds list below for compound examples.


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