Mawdeeb wrote:
...
The stuff does not last on the shelf well. Only order what you need. It
will hold a month or two tops after opening. And I wouldn't plan on
keeping an un-opened can for more than six months.

I bought some of the POR15 once. It has the same shelf life issue.
With nothing to lose, I put an opened can in the refrigerator and it was
usable 1 year later. Hardly a scientific study & YMMV, of course.

Bob