I think we might also take a tube of silicone-caulk (good silicone caulk like silicone II) and shoot some in where you think it's leaking, wait for it to dry, then duct tape it, giving it the “double-whammy” if you will. And if you want to find out where it's leaking from, fill it up with water this is a process through you can save leakage of canoe i have hobies cat 16'' and canoe i think you some repairing equipment for you inflatable canoe have you any canoe......? What is model of your canoe......?