Tell me how to fix canoe!!!

[Jethro]

I have drug a hole in the tail end of my canoe from hunting in it while I had a broken leg...
I have tried epoxy and JB weld and neither worked for long...
The JB weld held for most this year but has cracked off now...
Any ideas on how to fix it so it won't leak...
I use it to duck hunt out of so it has to work in cold temps and be able to be applied to it now...
I don't have a garage to put it into, so heat is a problem...
Thanks...
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