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Old 30 January 2015, 08:46   #1
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Best way to seal marine plywood

I am reupholstering seats on a commercial rib and was wondering if anyone could offer any advice on what to use to make sure marine plywood is properly sealed. Also, once sealed is it advisable to add any further protection? Varnish etc. Appearance is not important as no wood will be visible.

Thanks
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Old 30 January 2015, 08:54   #2
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I would have thought normal Yacht varnish would do that?
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Old 30 January 2015, 09:08   #3
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polyester resin?
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Old 30 January 2015, 09:16   #4
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polyester resin?
Resin is not water proof

Good varnish or gel wash
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Old 30 January 2015, 09:26   #5
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nugent you learn something every day cheers

epoxy resin is but more expensive
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Old 30 January 2015, 10:51   #6
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I've spent the last three days (and counting) in a heated tent in the shed epoxy coating the Robbins super elite ply deck all round (3 coats)... Expensive, but the best solution. As per previous post my understanding is that polyester isn't water tight and sticks to wood whereas epoxy is water tight and binds / soaks into wood
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Old 30 January 2015, 11:21   #7
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My seat bases have 2 coats of Reactive Resins 'Timberseal PS' low viscosity epoxy on them.
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Old 30 January 2015, 12:00   #8
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Why use Marine Ply? Had my seats done a year or so ago and the chap said why go to the bother of provoking the same issue (rotten seat bottoms) in the next few years using ply. He offered a plastic/acrylic type material which to my knowledge doesn't need sealing and will not rot. So far it has worked wonders.
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Old 30 January 2015, 12:15   #9
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Why use Marine Ply? Had my seats done a year or so ago and the chap said why go to the bother of provoking the same issue (rotten seat bottoms) in the next few years using ply. He offered a plastic/acrylic type material which to my knowledge doesn't need sealing and will not rot. So far it has worked wonders.
That's right there was something on here recently composite boards for bunk trailers why use wood
Thinking about it when they make plywood Canadian canoes they stitch the ply together then epoxy & tape the seams then coat the lot with epoxy two coats
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Old 30 January 2015, 13:06   #10
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Depending on strength needed an expanded plastic is also really light weight.

In less time than it would take to varnish them, a router and follower bit could turn out a whole new set.
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