waterproofing wood

Painting options, interior and exterior.

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SamsBoat
Posts: 12
Joined: Fri Oct 16, 2015 12:08 pm
Location: Florida

waterproofing wood

Postby SamsBoat » Wed Aug 02, 2017 1:53 pm

Looking for some advice on sealing the interior wood surfaces of a boat. It is completely open to the elements and about thirteen feet. The wood is currently raw but we are about to stain with a water-based stain. The exterior of the boat has been stained, fiberglass & epoxied and varnished. Any recommendations for waterproofing / sealing the wood would be helpful.

WayWard
Posts: 18
Joined: Sat Jun 10, 2017 2:53 pm
Location: Maryland

Re: waterproofing wood

Postby WayWard » Wed Aug 02, 2017 1:59 pm

It's hard to beat epoxy.

I've used MAS before. But bear in mind if you don't varnish it will yellow on you. May or may not matter.

JimmY
Posts: 661
Joined: Sat Jul 30, 2016 11:08 am
Location: Brighton, MI

Re: waterproofing wood

Postby JimmY » Wed Aug 02, 2017 5:18 pm

Epoxy is the general go to here for water proofing and protecting wood. Most (all?) epoxies are NOT UV stabilized and will age in the sun, so you need to paint on some kind of UV protection (e.g., Varnish, marine paint, etc...). Lots of choices in paints.
-Jim
Nothing says poor craftsmanship like wrinkles in your duct tape!

PeterG
Posts: 540
Joined: Mon Dec 03, 2007 7:08 am
Location: Connecticut

Re: waterproofing wood

Postby PeterG » Wed Aug 02, 2017 8:09 pm

Epoxy encapsulation is commonly done and works well for most of us here for new built boats. Depending on how you are finishing the interior (you mentioned staining) there is another product called Smith's CPES, or Clear Penetrating Epoxy Sealer. Typical epoxy formulations don't soak very much into the grain of the wood. But CPES is a specialized one part almost watery epoxy that is intended to soak into the wood fibers and cells to prevent moisture and mold spores from causing rot. It will still require a top coat of UV protection like varnish or paint, but will not have as thick of a coating buildup like regular epoxy can. You basically paint it on until it stops soaking into the wood. It smells like hell until it cures but it's one of the best ways to seal the wood to protect it. Most antique boat restoration shops use it for sealing the wood structure and interior of the planking to protect it from rot and from moisture intrusion, which can expand and stress the wood causing splits and popped joints.
Murphy's Law: Anything that can go wrong, will go wrong.
Griffin's Law: Murphy was an optimist.

Katie
Posts: 6
Joined: Wed Nov 01, 2017 3:41 am

Re: waterproofing wood

Postby Katie » Wed Nov 01, 2017 4:14 am

There are some ways to water proof the wood. Prepare your wood by rubbing off any previous finish with sandpaper. You can use two different sandpaper grits-rough to get the tricky parts and then fine to give the wood a uniform finish. Apply the End Grain Sealer Kit according to the instructions. You’ll usually want to use a paintbrush, taking special care to get a uniform coat on the wood. Use the kit in the order prescribed, allowing it to dry as necessary. For new built boats Epoxy encapsulation is commonly used. Alternative one is Clear Penetrating Epoxy Sealer.

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kens
Posts: 4563
Joined: Wed Nov 12, 2003 5:25 pm
Location: Coastal Georgia

Re: waterproofing wood

Postby kens » Wed Nov 01, 2017 5:46 am

are you going to paint it, or do you want it bright wood??
Oak is over rated, everything about it takes extra time; then it warps, splits or checks !!! :roll:


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