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There is not enough data to determine whether the following common O-Ring materials are suitable for using in the environment containing Freon 502 (F22+F316) or not.

• Aflas: Aflas is the tradename for a unique fluoroelastomer based upon an alternating copolymer of tetrafluoroethylene and propylene ("TFE/P").
• Epichlorohydrin: Epichlorohydrin (ECO) has properties similar to nitrile rubber but with better heat and oil resistance as well as better low temperature flexibility.
• Fluorosilicone: Fluorosilicone combines excellent low-temperature performance of silicone with improved chemical resistance.
• Hypalon: Hypalon is the traenme of a clasof Chlorosulfonated Polyethylene (CSM).
• Kalrez: Kalrez is the tradename for a perfluoroelastomeric material.
• Hydrogenated Nitrile: Hydrogenated Nitrile Butadiene Rubber (HNBR) is also known as Highly Saturated Nitrile (HSN).
• Polyacrylate: Polyacrylate (ACM) is a class of copolymer of ethyl and acrylates.
• Polysulfide: Polysulfide was one of the first commercial synthetic elastomers.
• Cast Polyurethane: Cast Polyurethane exhibits outstanding tensile strength and abrasion resistance in comparison with other elastomers.
• Millable Polyurethane: Millable Polyurethane rubber is made from both polyester and polyether polyols.
• Silicone: Silicone is a semi-organic elastomer with outstanding resistance to extremes of temperature.
• Virgin Teflon: Because Teflon is a hard plastic rather than a stretchy elastomer, it is uncommon to see an o-ring that is made entirely of Teflon.
• Vamac: Vamac is the tradename of a class of Ethylene Acrylic elastomer (AEM).