ski repair?

I use the old tried and true JB Weld.  I have used a couple of others over the years claiming to be for plastic etc..  but they don't hold like JB.

I would recommend G/Flex epoxy from West Marine. It bonds to almost anything. I use it to repair foil boards. Most are epoxy based, but often have UHMWPE or PE topsheets and various materials for the inserts in the deck.  To ensure a good bond I would lightly scuff the AL top sheet with sand paper. If there is old epoxy or adhesive be sure to remove anything that is at all flaky. I used a torch to lightly flame the plastic top sheet on a ski I fixed recently. You won't need to do that with AL. Much better if you can vacuum bag the ski, but if you can't work that out a whole bunch of clamps and some cross pieces will work. Too much epoxy or adhesive isn't good. Not much structural strength in epoxy or adhesive alone so figure out how to clamp it and squeeze out the excess. G/Flex cures hard but retains some flexibility that straight epoxy does not. Not cheap, but I use it a lot. 

I think you were right to try jb weld.  I used some other adhesive on my old EP GX3 Turboglass and the first time in the waster doing a deep water the top came back off. 

uncle-buck wrote: I ended up using JB Weld Marine. We'll see how well it works. Thanks for the suggestions.