Question
I have some questions about PVA glue. We are new to this type of glue and I am using a sample that has been sitting around the shop for a couple of years. We are doing some edgegluing of plastic laminate to plywood cores. We use a heater bar set at about 90º for ten minutes. Our heater bar has a timer switch on it so that you can walk away without worrying if the glue will overcook and crystallize. Last Friday I glued an edge and left the piece on the bar. The piece was still on the bar this morning while I pre-heated for another glueup. After the second piece was in the clamps I removed the older one.When I tested the edgebanding for adhesion, it had no stick at all. This seemed unusual because the pieces that were only heated once seemed to be really well glued.
My questions are:
1) Is there a pot life to this type of glue?
2) Will it reactivate itself if glued a second time?
3) What is a good brand to use for this purpose?
Forum Responses
(Adhesives Forum)
From contributor A:
PVA definitely has a pot life, and I would never use any older than one year. It's pretty cheap, so I would advise buying a fresh supply. Anything made by Franklin or Borden should work fine.