AGE RESISTANCE COMPARISON
Age resistance generally associated with products fabricated from various rubbers. This table, taken from MIL_HDBK-695C, is quite conservative.Maximum (up to 20 years)
SiliconeFluorocarbon
Average (5 to 10 years)
HypalonEPDM
Butyl
Neoprene
Polyether urethane
Hydrin
Minimum (3 to 5)
Nitrile, Buna NSBR
Natural Rubber
Polyester urethane
Use care when using and interpreting this table, because Nitrile when compounded using age resistance additives may have a shelf life of up to 10 years. In addition, warehousing environmental factors affect actual shelf life.