In article , Casper wrote:
...starts degrading the moment you expose it to air. The alcohol in it
will absorb moisture from the air and eventually becomes unusable
from the stand point that it may never cure.
Leon

This is a still sealed bottle dated to use before Jun 30 2005. I have
not opened it. I received it as part of an xmas gift. I'm guessing
this was sitting towards the back of the shelf and went unnoticed. I'm
torn between using it and seeing if they will take it back this late.

If it's never been opened, and has been stored at room temperature the whole
time, it's probably still good, based on my experience with the stuff. But
test it on scrap first, before applying it to a project.

And forget about asking the retailer to take it back, unless you have a sales
receipt showing it was sold after the expiration date. That's not right.