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sneak boat sealer #8186693 02/28/21 03:55 PM
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newguy00 Offline OP
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I'm building my first sneak boat and had a question about sealing it. I have searched online and most threads about sealing wooden boats have to do with leaving natural wood shown. since I plan to paint mine I wanted to know if anybody had experience with this? its mostly constructed out of plywood for the hull. I was going to go with a marine grade paint and use a polyurethane varnish on top, any other suggestions?

Re: sneak boat sealer [Re: newguy00] #8187003 02/28/21 09:00 PM
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Go join duckboats.net There is decades of info on this if you dig through old posts. I have hunted wood hulled scull boats before and still own one. It has been part of my family history for generations. If I were to attempt an answer to your question it would be this.

Plywood hulls NEED to be sealed to work correctly. They do not swell like oak lathe hulls. They just separate. A thin layer of fiberglass will work. The wood hulls that are left natural are wood lathe and sealed normally with Oakum, pitch and linseed oil. Like the old school tall ships. Unless you are a history buff and want to hunt like the market hunters, you are better off going with up to date tech. Also, with plywood hulls you need to scarf the joints, not just butt joint. If you want true hull integrity. I got really into this with scull boats for years and it was awesome. But tons of work. Like I said, go join duckboats, and be really respectful. If you ask nice you will likely get answers directly from the guys in the industry that have built wood boats for years.

Good luck! And post pics!! Wood boats rock.

Re: sneak boat sealer [Re: newguy00] #8187046 02/28/21 10:06 PM
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If you're on Facebook this page is really good.

https://www.facebook.com/groups/1401321466609729/?ref=share


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Re: sneak boat sealer [Re: newguy00] #8187235 03/01/21 01:22 AM
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I used two part expoy on mine.

Keep an eye some times you can find two part exopy garage floor paint pretty cheap


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Re: sneak boat sealer [Re: newguy00] #8187913 03/01/21 04:09 PM
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What boat are you building?

I built a plywood boat many years ago. My boat was actually the first customer completed Gatorboats Duckhunter.

Plywood will eventually check and when it does it allows water intrusion. Even if you painted it, the paint can separate/check with the plywood and allow water in. The best way to seal your plywood boat is marine 2part epoxy and fiberglass encapsulation.

Before you paint your boat, I'd recommend the following:

-brush/roll the entire interior and exterior with a couple of coats of two part marine epoxy. The plywood will soak up or "drink" much of the first couple of coats. Lightly sand between coats knocking down the raised wood grain and the epoxy "blush."
-Once you have coated the boat a couple of times, the exterior should get a layer of fiberglass cloth and epoxy.
-After fiberglassing the exterior, you can coat with multiple thin coats of epoxy (sanding between coats) until desired smoothness is achieved.
-One final sand and then paint as desired.

This doesn't mean you can leave your boat outside in the yearlong weather, but with proper care and storage it will last a long time.

Epoxy is expensive. I haven't price checked in a long time but back when I built my boat, this was the most cost effective epoxy out there. I bought my epoxy and fiberglass from this place. I used the 3:1 "medium" epoxy.

http://www.uscomposites.com/epoxy.html


.


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Re: sneak boat sealer [Re: newguy00] #8189195 03/02/21 03:32 PM
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newguy00 Offline OP
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thanks for all the info from everybody. I appreciate all the links and suggestions.

Re: sneak boat sealer [Re: newguy00] #8191087 03/03/21 10:50 PM
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Good stuff

Re: sneak boat sealer [Re: newguy00] #8191302 03/04/21 01:37 AM
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If you are near Fort Worth you might check with https://www.compositesone.com/people/about/locations/distribution-centers/fort-worth-texas/
About 10 years ago it was our best source of materials for fiberglass since we could pick it up at the warehouse.


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Re: sneak boat sealer [Re: newguy00] #8191805 03/04/21 03:24 PM
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I did a plywood using exterior grade 3/8" and it leaked a little but I just kept a sponge handy. I painted it olive green inside and out.

Re: sneak boat sealer [Re: newguy00] #8191951 03/04/21 05:45 PM
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I used combo of exterior ply wood and Maine grade. Hull is exterior and cap marine. My layout/sneak boats over 10 years old.

Comes down to how well you seal it. Mine is glassed in and out. Marine grade is usually kin dried with a waterproof glue.

Only down to mine is it’s a tank weight wise and I should of went lighter all around




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