Hey, so I ran into this stuff this morning at the hardware store and thought I'd give it a try. Squirt tube of UV-reactive plastic at one end, and a UV light at the other. cures in four seconds or so. don't look at the light. I've tested it in several applications so far, and the stuff is pretty darn good at small work that I would normally have to use epoxy to do. I built a solid cannon barrel sleeve this morning with it, and am using it for some spot repairs on the hull. Obviously it's not the thing to use in place of a solid, methodical epoxy job, but if something gets jacked up at pondside, this stuff may be able to help get the boat back in the water. website: https://notaglue.com/
I agree. I found it at dollar tree for a buck apiece and I use it to hold pieces in place while I epoxy. Like decks and prop shafts.
That's what I just did on a rudder build. three tack points and it held the shaft perfectly in place for the epoxy