Hi Mike: I have had a quantity of PVC-E glue for over 20 years, and it
still works as good as new.  I got it from National Casein Products,
http://www.nationalcasein.com/   While I certainly cannot guarantee
that your glue is still good, it is easy to test: glue some scraps of
different materials together and see what happens.  As you probably
know, the glue is white until it dries, and then it becomes clear.

Since I am running out of my supply of this glue, can you sell me some?

Randolph Herr