Epxoy sealer coat on hull...

Hey Experienced Epxoy Spreaders,

I just finished putting on a sealer coat of epxoy on the outside of my hull, and I noticed several things: if I look at the hull I can see spots that look dull and some that look wet...and...after I smoothed over the wet epxoy with a foam brush to take out bubbles from the roller...I still see these dull and not as dull spots.

Are these dull spots places where the wood has soaked up more epoxy than the surrounding wood?

I will wait a few hours before doing the cotton ball/swab test, and then it's time to put on the fiberglass and wet it out.

Guess I'm a nervous first timer or a perfectionist, but atleast I have you all as boat building therapists...lucky for me!

Chris F

6 replies:

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RE: Epxoy sealer coat on hull...

I think it is just areas with more or less epoxy, wheather it is due to soaking into the wood or not. Go ahead and glass the hull, you will end up using several fill coats.


You might try doing the inside of the hull 1st and see if it looks the same. It will give you practice.

RE: Epxoy sealer coat on hull...

Don't worry about it - the fact that you have done a seal coat before putting the Glass on means you will get a much better finish - and find it pretty easy to put the glass on.

what you see now is nowhere near what it will look like once you have done the glass and filled the weave with 2-4 light coats of epoxy.

If you have left it longer than a few hours between the wood-sealing coat and applying the glass, then a light snad all over is required, then a wash down with a damp cloth to remove any dust and you are good to go.

RE: Epxoy sealer coat on hull...

I assume you are talking about a seal coat made of epoxy thinned 50% with xylene?

If so you will probably want to do three passes at minimum. Thw wood really drinks that stuff in. After three coats it sorta stops going into the wood and you can, after it sets, do a quick sanding to get any of the last hairy bits knocked off. When you do your glassing you will find that you need far less resin than you would expect to get the cloth wet out nicely.

RE: Epxoy sealer coat on hull...

Lest anyone get the idea that seal coats are necessary before wetting out fiberglass, the videos I've seen of Nick Schade show him applying glass to bare wood -- and from what I have read, his work is museum quality.

If I were using stain (water-based only) on the okoume, though, I would do the staining as early in the build process as possible, and immediately seal it with epoxy.


RE: Epxoy sealer coat on hull...

As Old Yeller points out  it is not necessary - BUT For someone who is in-experienced with using epoxy, sealing the wood first will make it a lot easier to lay your glass - and it will use FAR LESS epoxy than doing it on a dry hull.  Less Epoxy is a lighter boat.


Lets face it, comparing a first (or even 2nd) time builder to Nick is not very fair!  He has a lot of experience working with Epoxy and glass and knows how to get a great finish.  You will not regret doing a very light coat on the hull before glassing.

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