[quote=Dogboy]Probably a question best asked on the Hobie forum or sent directly to Matt Miller.
Some pictures would also be helpful.
The general consensus is that, since polyethylene is an inert material, there is really nothing that will permanently bond to it so repairing cracks in the hulls is difficult to impossible. I believe some folks have reported having marginally successful results using polyethylene welders or West Systems G-Flex epoxy.
Depending on the location of the crack, generally the best/strongest approach is to "splint" the cracked area back together using mechanical fasteners (screws/bolts/rivets) and a backing plate of some sort, preferrably on the inside of the hull. Seal the crack and the fasteners with silicone caulk or similar when installing the backing plate.
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