RR epoxy storage and shelf-life?

Since it is getting cold up in the NE (specifically, NJ) and I have quite a bit of my stock of RR epoxy left sitting on a shelf in an unheated garage:

  1. what is the shelf-life of RR epoxy and hardener?

  2. is there an optimal storage temperature (specifically, will freezing temps affect it)?

I was using R&R epoxy in 1999 .And quit glassing with epoxy do to rashs on my arms. Rash was from epoxy used in the early 90’s NOT R&R.I had a few gal. left And glassed a board with it 2003.Worked great.I had it stored in a cold shop and just had to heat it up. I,m back to using R&R again. Gordon