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Is there a way to seal rotting plywood so the rot won't progress any further? Or even after a waterproof sealant, it will still continue to rot and disintegrate? thanks!

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  • cbalis7 Jun 03, 2010

    thanks, that was very helpful and thorough!



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No. The problem is that the waterproofing has to act as a barrier between dry good wood and any rot or dampness. There is no way that a sealer will be able to penetrate to the middle of the board where that boundary currenlty is. And even if it could, the area where it is soggy will continue to degrade until it falls apart. And if you could apply some kind of fungicide to soak in and kill the rot, it wouldn't do anything to heal or dry out the rot you already have. The only partial method is to cut out the bad areas and replace them. Or if a very temporary solution is needed, you can put another layer on top - but that won't stop the rot or the mildew.

Posted on Jun 03, 2010


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