One item I've always tried to
keep in the tool box is a tube of cyanoacrylate (SuperGlue).
I usually get to use a tube 2
or 3 times before it clogs up...even the more advanced containers still
seem to eventually stop flowing well before the glue is gone.
Welder is a new all purpose
contact adhesive I've had great luck with in the past year that's made
with a chemical known as Toluene.
It's somewhere between SuperGlue and a 2 part epoxy and is easy to work
with and even easier to open back up a few months later without the cap
being permanently stuck.
There is a danger to this stuff.
Keep away from open flames and avoid prolonged contact with skin.
Permanent brain and nervous system damage can result from deliberate concentration and inhaling of this content.
@irilyth
I'm guessing this glue is some kind of plastic dissolved in toluene with some additives. As the solvent evaportates, the plastic reverts to a solid.