Regarding Gordon Stelter's question on PVC-E degrading, I buy the glue
in quarts from Schaff, keep a small supply in a squeeze bottle on the
work bench and store the rest in the shop refrigerator.  I have never
had any problems with the glue degrading.

I also use Aleene's glue when gluing fabric on fabric, as the PVC-E
glue seems to need some porosity to dry properly.

Larry Schuette - The Player Piano Man
Raymond, Nebraska