Alumilite Shelf life

[Evil Appetite]

Someone purchased the beginner package for me last Christmas. I still haven't used it. Anyone know how long this stuff lasts unopened?

[Scale-Master]

I had some that went bad before it separated (resin). Meaning it looked OK, but did not cure correctly. Once it is separated it is bad, you can see it. If it has not separated it might still be good.

[Eshaver]

An un opened package , uh about two years . An opened opened package , best , three mos . Ed Shaver

[highway]

An opened opened package , best , three mos . Ed Shaver

I must disagree, I had some Alumilite that I made parts from that was open and much older than three months. I would guess it was close to 2 or 3 years old and was still usable. If it gets a hole in the bottle somewhere though, it's junk! I must have accidentally tweaked the top when I had put the cap back on it the last good time I'd used it, and put a small crack in the lid. After that, it would not set at all.