I have 6 year old epoxy; west 105 and 205. The hardener has turned brown, but still seems to harden. I last used it two years ago (already brown) and it worked normally.
I am gluing up a table that must be waterproof. It consists of 27 slats joined to two end rails with dominoes. No way on earth I can do it with woodworking glue; just not enough time. Epoxy was suggested to me.
27 dominoes is pretty serious overkill. If the epoxy has half it's original strength,that would be fine. If it has no strength, that would be a costly error and create a pile of walnut firewood.
If using it is a bad idea, how about keeping the 105 and picking up a small can of fresh 206 to go with it.
I would prefer not to put much money into this because I probably won't be using it again for a few years; judging by my past. Thanks.
Yes, I have glued up several joints to test the stuff, but that will only show initial failure; it won't tell me if it will fall apart in a year.