I bought a piece of PVC board from Lowes, a 3/4" x 5 1/2" by 8' long piece cost $13. I used the JB Weld Marine Epoxy with 3900psi strength rating. I read that the 3M5200 can cause oxidation on aluminum hulls. Probably take 50 years for it to rust out, but who knows, plus the JB Weld was easy to get, it was in stock at Auto Zone. Wish I would have saw this sooner, I could have cut you a piece and sent it to you OP. I have 7ft of board left and no use for it...