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Posted for N295VV@aol.com:

My personal opinion re shelf lives on epoxy is that the life of the epoxy
resin itself is many years.  The hardener, however is the one that has
limited life.

Both may probably extended several times by storing in a refrigerator.  

Personally, I would not pitch the epoxy after a year, or even three years.
Buy just the hardener after the expiration date.  I have done this with
Hysol, which gives off ammonia when it starts to go bad.

The Teta hardener was stable in the shipping can for several years.....

Storage in cold is a common practice among propellor builders, even storage
of the mixed components.  It is a common practice among chemists as well
for unstable materials.

If you are skeptical, ask the Shell tech rep at OSH about storage.

David Jones
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