Mix it thoroughly in a smaller container, use what you need and then move it to shallow pan if you need more time.

What is your project? Perhaps a new thread in the builders section?

Small cups, and dont mix more than you need. Have some extra parts lying stand-by for gluing and very little epoxy is thrown away.

It always pays to have the guy that is paying for the epoxy to do the batching.That way he will never mix too much!

Failing that, I try to have a filling job in the background so that any excess can be mixed with filler and used on that.

I have just come to the end of my 50 gallon drum of West. Like the death of a friend it is.