My friend just told me about some stuff called Marine-Tex (??) (not exactly sure of the name or spelling). Evidently it's so strong you can drill it and tap it and it will hold a bolt almost as good as metal. He took some, drilled it, tapped it, put a bolt in, put it in a vice and tried to pull the bolt out and it wouldn't budge. Not that you will need to do any of this but the point I am trying to make is that it sounds like it's really strong, durable stuff and might be worth trying to fix your leak, if possible. You have to by it at a marine store. I think it's a pretty new product. It's NOT that Perma-Tex stuff marine stores sell. I hope this helps some.

Scott