Something new out there. Liquid plastic that sets in 4 seconds with a UV light. Its being marketed as plastic weld.
Bondic | Your Hard Fix For Sticky Situations | Not a Glue
Small enough to take with you on long trips in case of emergencies. I don't know if it works, I've ordered some to experiment with, but I don't have an actual break in any of my boats. I do have a gouge that's kind of deep in one of my rec boats, but not one in my ww. Will post more later if it looks like it holds well in the gouge in my rec boat.