Ethylene-Propylene, or EP, is available in several polymer variations, all of which exhibit excellent resistance to polar fluids such as water, phosohate esters and ketones. It is not resistant to petroleum oils and solvents. It possesses excellent resistence to heat degradation, compression set, low temperatures, sunlight, ozone and weathering. In many (but not all) applications it can be substituted for butyl rubber. It is superior to butyl with regard to compression set and resilience, but is more permeable to high pressure gas.

Ethylene-Propylene
3-5601-70: A general purpose ethylene propylene compound for fluid service and for belt-drive service. Demonstrates excellent resistance to ozone and flexing. Temperature range -70°F to +300°F in certain applications.

Compound Number:	3-5601-70
Use with:	Water Alcohol Acetone Ammonia Engine coolant Vegetable oil Animal fats
Do not use with:	Petroleum oils and fuels Toluene Trichloroethane
Temperature Range (F):	-65° to +200°
Comments:	Conforms to FDA requirements (except for milk and edible oils). Reference CFR 177.2600

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Ethylene-Propylene
3-5607-80: Compounded specifically for service in Skydrol hydraulic systems in commercial aircraft. Temperature range -65°F to +250°F, intermittent to +300°F.

Compound Number:	3-5607-80
Use with:	Skydrol
Special Applications:	Commercial aircraft hydraulic system seals
Temperature Range (F):	-65° to +250°
Military Drawing Numbers:	NAS 1611 NAS 1612
Comments:	Also meets spec. NAS 1613. Approved by Boeing and McDonnell-Douglas. O-Rings carry green dot, white dash, green dot identification assigned to Parco.

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