Seals and Gasket Material Shelf Life
Maximum (Up to 20 Years) |
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| Type of Rubber | Common or Trader Name | ASTM D141S Abbreviation | ASTM D2000 Designation | MIL-STD-417 |
| Silicone | Silicone | Q | FE | TA |
| Fluorosiltcone | Silastic LS | FVMO | FK | TA |
| Polysulfide | Thickol | T | EK | SA |
| Florocarbons | Flurel. Won* | FKM | HK | |
| Polyacrylale | Acrylic | ACM. ANM | DF. DH | TB |
Average (5 to 10 years) |
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| Type of Rubber | Common or Trader Name | ASTM D141S Abbreviation | ASTM D2000 Designation | MIL-STD-417 |
| Chlorosulfonated polyethylene Isobutylene/ | Hypalon" | CSM | CE | |
| Isoprene | Butyl | MR | AA, BA | RS |
| Polypropylene | Neoprene | CR | BC, BE | SC |
| Polyether Urethane | Urethanane | EU | EG | |
| Polypropylene Oxide | Propylene oxide | GPOO | ||
| Ethylene/propylene diene | Ethylene propylene terpolymer | EPDM | BA,CA | ... |
| Ethylene/propylene copolymer | Ethylene propylene | EPM | BA,CA | ... |
| Epichlorohydrin homopolymer | Hydrin 100, Herclor H | CO | ||
| Epichlorohydrin ethylene oxide | Hydrin 200, Herclor C | ECO | ... | ... |
Minimum (2 to 5 Years) |
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| Type of Rubber | Common or Trader Name | ASTM DM13 Abbreviation | ASTM D2000 Designation | MIL-STD-417 |
| Butadiene/acrylonitrile¹ | Nitrite. NBR | NBR | BF. BG. BK. CH | SB |
| Butadiene/styrene | SBR | SBR | AA. BA | RS |
| Cis-potyisoprene | Butadiene | BR | AA | RN |
| Cis 1, 4, polyisoprene | Natural, pale crepe | NR | AA | RN |
| Cis 1, 4, polyisoprene | Synthetic natural | IR | AA | RN |
| Polyester urethane | Urethane | AU | ... | ... |
| ' NBR. when compounded for O-ring seals, may have a shelf life as high as 10 years when aging resistance requirements are specified in the specification. | ||||
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