AGE RESISTANCE COMPARISONAge resistance generally associated with products fabricated from various rubbers. This table, taken from MIL_HDBK-695C, is quite conservative.
Maximum (up to 20 years)Silicone
Average (5 to 10 years)Hypalon
Minimum (3 to 5)Nitrile, Buna N
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.