BUNA-N Nitrile This is most popular all-around O-Ring. It has excellent resistance to petroleum-based products hydraulic fluids most silicone fluids and fuels. Excellent compression set resistance to tear and abrasion exhibiting high tensile strength. Not good against weathering. sunlight ozone Good for hydraulic actuator seals hydraulic pump seals water pump seals carburetor seals transmission seals.
Temperature -20 F to +250 F Color is black.
EPDM Perfect for water transmission systems. Meets ANSI/NSF Standard 61. Ethylene Propylene is a copolymer F ethylene and propylene. Ethylene-propylene-diene rubber is produced using a third monomer and is particularly useful when sealing phosphate-ester hydraulic fluids and in brake systems that use fluids having a glycol base.Good temperature range.
Temperature range -65o to 300o F Color is black.
Excellent wide temperature range with excellent long-term exposure to dry heat. Good weather and ozone resistance. Poor tear and abrasion Static use only. Silicone resists brake fluids and high aniline point oil. It is not recommended for ketones or most petroleum oils. Commonly used in electrical connector inserts hot air duct seals dust shields and boots spark plug boots medical product seals and electric appliance seals.
Temperature range -65o to 450o F Color is Brick red
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