The small pad on the upper octave key arm fell out. Can I just glue it back in? What kind of glue should be used?
Best answer. It doesn't have to be flaming red hot to melt it right back inYou might take the key off and see how much shellac is in the key cup. You can already see how much is on the back of the pad. If there is a sufficient amount you can simply heat the key cup and reinsert the pad pressing it down into the cup.
"Hot melt" also includes those glue guns used for arts and crafts. The glue from those guns is not reworkable.If the previous installer used anything other than a hot melt glue - that includes shellac - then reheating will not do the job.
(This is a major reason why hot-melt is the standard.)
In my experience - I've used them for other purposes - They soften with heat, and re-"harden" when cool, therefore reworkable - "thermoplastic". It's just that they do it at a lower temperature, not really appropriate for woodwind."Hot melt" also includes those glue guns used for arts and crafts. The glue from those guns is not reworkable.