How to properly seal ply hopper

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How to properly seal ply hopper

How to properly seal ply hopper

I built a plywood hopper for my EDPM flat roof. I had to modify the outlet location to the side, and fixed the 68mm round pipe with Sticks Like, and then re-resined it, and sealed the bottom again for good luck (Im terrible at fibregalss, so thats why it looks rough).

All good so far, but in heavy rain there is a leak through the ply to the underneath, that I'm pretty sure comes from around the pipe hole, and I later learnt resin doesn't bond to many adhesives. And it feels crunchy and...

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by phatboy

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