I have applied the first coat of polyurethane on stained, iron-on oak edge banding and the finish continues to be tacky in spots after 5 days of drying. Has anyone encountered this problem? The finish on the surfaces of the oak veneered particle board panels was dry after the first day.
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Replies
How old is your poly?
Purchased Minwax Fast-Drying Polyurethane in July 2007. I don't thing that's the issue because it dries fine on the panel veneer.
You may have applied too much heat on the edgeband which made the glue penetrate from the backside. The thinner in the poly just turned it to a sticky mess.
Beat it to fit / Paint it to match
I usually clean off edgebanding with mineral spirits, which seems to disolve extra hot glue. You might try cleaning your sticky bits off with that and refinish
Did you use contact cement to hold the edge banding on?
No, the edge banding has an iron-on adhesive.
Can you strip off the poly, wipe it clean with naptha and give it a coat of shellac before the poly goes on?
"I cut this piece four times and it's still too short."
Thanks for all of the replies.
I believe I've uncovered the root cause of my probelm. After trimming the banding, I cleaned up the edges with 220 sandpaper. The paper became contaminated with the thermal-set adhesive and when I used the same paper to sand the surface of the banding material, I smeared a thin coat of adhesive its the surface. As I learned, the adhesive reacted with the poly and made it stay tacky for a long period. I put the tacky panels in the sun for two days of low humidity and temps in the 80's and the tacky surfaces finally cured. Yesterday, I did some more banding and was careful to use one set of sandpaper to clean up the edges and to use a different set to sand the surface. These panels did not have curing problems.
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