Marine Plywood - FAIL

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Johnny

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Ran across this post on the WoodenBoat forum from a few years back.
The poster was looking for ways to repair this issue on his newly built wood boat.

It is Hydroteck BS-1088 Marine Plywood...... the best on the market.
He says: "the whole pile of plywood looked great, not a void in any of the edges".
so he goes on to skin his hull with this material . . . after applying one coat
of oil based marine primer, he found this the next morning !!!
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aparrantly, he did everything right. used all the correct fasteners and adhesives.
it is just one of those things that haunt us all in one way or another.
this is probably a factory defect on this one sheet alone. (lucky him).
just goes to show you that "stuff can happen" no matter what we try to do to prevent it.
my recommendation would have been to peel back all the cancer to good wood.
make a paper template of the damaged area - cut two pieces of fiberglass cloth to fit
and epoxy one in place. Then, fill all the voids and imperfections with thickened epoxy and
apply the second layer of glass cloth......
then - - - - sand smooth - prime - sand - prime - sand - prime and sand some more until it is invisible.





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Wow, bad news all around. Most larger cities have places that make or sell composite materials. I was told the leftover stuff I bought was used to make a bus floor.
 

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