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Surface Moistures and Epoxy

  
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Beardow T & P

External


Since: Sep 18, 2007
Posts: 2



(Msg. 1) Posted: Tue Sep 18, 2007 5:40 pm
Post subject: Surface Moistures and Epoxy
Archived from groups: rec>boats>building (more info?)
I am milling 16' lengths of western red cedar into strips for a jollyboat.
This wood is fresh from the forest and is moist to touch.

Can I have some opinions on what the surface moisture shld be before I
epoxy and FG this stuff?

Cheers, T.
--

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Paul Oman1

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Since: Mar 24, 2004
Posts: 79



(Msg. 2) Posted: Tue Sep 18, 2007 5:40 pm
Post subject: Re: Surface Moistures and Epoxy [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Beardow T & P wrote:

>I am milling 16' lengths of western red cedar into strips for a jollyboat.
>This wood is fresh from the forest and is moist to touch.
>
>Can I have some opinions on what the surface moisture shld be before I
>epoxy and FG this stuff?
>
>Cheers, T.
>--
>
>
>
>
some epoxies can actually be mixed and applied underwater. Some can be
applied to damp surfaces, others cannot.

The real concern should not be the epoxy but rather the movement of
the wood. Woods expand and contract with moisture, other things,
including epoxy, expand and contract with temperature...

paul oman
progressive epoxy polymers inc
www.epoxyproducts.com

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cavelamb himself

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Since: Aug 18, 2007
Posts: 43



(Msg. 3) Posted: Tue Sep 18, 2007 5:40 pm
Post subject: Re: Surface Moistures and Epoxy [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Beardow T & P wrote:

> I am milling 16' lengths of western red cedar into strips for a jollyboat.
> This wood is fresh from the forest and is moist to touch.
>
> Can I have some opinions on what the surface moisture shld be before I
> epoxy and FG this stuff?
>
> Cheers, T.
> --
>
>

As a starting point? 12 to 15%
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Lew Hodgett

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Since: Jun 30, 2003
Posts: 132



(Msg. 4) Posted: Tue Sep 18, 2007 5:40 pm
Post subject: Re: Surface Moistures and Epoxy [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
"Beardow T & P" <beardow RemoveThis @shaw.ca> wrote in message
news:A4UHi.195768$fJ5.173267@pd7urf1no...
> I am milling 16' lengths of western red cedar into strips for a
jollyboat.
> This wood is fresh from the forest and is moist to touch.
>
> Can I have some opinions on what the surface moisture shld be before
I
> epoxy and FG this stuff?
>
> Cheers, T.
> --


Talk to Gougeon.

Lew
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Dave W

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Since: Jun 22, 2003
Posts: 86



(Msg. 5) Posted: Fri Sep 21, 2007 8:55 am
Post subject: Re: Surface Moistures and Epoxy [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Fortunately, the cedar will dry very quickly if if is cut into thin strips.
A few weeks outdoors protected from rain should do it.
Dave
"Beardow T & P" <beardow.RemoveThis@shaw.ca> wrote in message
news:A4UHi.195768$fJ5.173267@pd7urf1no...
>I am milling 16' lengths of western red cedar into strips for a jollyboat.
>This wood is fresh from the forest and is moist to touch.
>
> Can I have some opinions on what the surface moisture shld be before I
> epoxy and FG this stuff?
>
> Cheers, T.
> --
>
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Beardow T & P

External


Since: Sep 18, 2007
Posts: 2



(Msg. 6) Posted: Sun Sep 23, 2007 11:18 pm
Post subject: Re: Surface Moistures and Epoxy [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Thanks for the advice, guys!

T.

"Beardow T & P" <beardow.DeleteThis@shaw.ca> wrote in message
news:A4UHi.195768$fJ5.173267@pd7urf1no...
>I am milling 16' lengths of western red cedar into strips for a jollyboat.
>This wood is fresh from the forest and is moist to touch.
>
> Can I have some opinions on what the surface moisture shld be before I
> epoxy and FG this stuff?
>
> Cheers, T.
> --
>
 >> Stay informed about: Surface Moistures and Epoxy 
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jim.isbell

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Since: Jun 09, 2007
Posts: 11



(Msg. 7) Posted: Mon Sep 24, 2007 10:55 pm
Post subject: Re: Surface Moistures and Epoxy [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
On Sep 23, 6:18 pm, "Beardow T & P" <bear....DeleteThis@shaw.ca> wrote:
> Thanks for the advice, guys!
>
> T.
>
> "Beardow T & P" <bear....DeleteThis@shaw.ca> wrote in messagenews:A4UHi.195768$fJ5.173267@pd7urf1no...
>
> >I am milling 16' lengths of western red cedar into strips for a jollyboat.
> >This wood is fresh from the forest and is moist to touch.
>
> > Can I have some opinions on what the surface moisture shld be before I
> > epoxy and FG this stuff?
>
> > Cheers, T.
> > --

My advice. Bone dry. I recently built a canoe with Western Red Cedar
and Teak strips. It was dry, or so I thought. I fiberglassed it and
then laid on 10 coats of varnish over a period of several weeks. Each
coat had dried for more than 24 hours, including the epoxy. Then I
set it on the lawn for several hours where it was in the sun while I
took some pictures of it. That afternoon I went to retrieve it and
found hundreds of white, tiny, bubbles coming up through the well
cured epoxy and glass. It looked like needlepoint as each of the
little bubbles was evenly spaced by the grid of the glass cloth. ALL
the bubbles were from the strips of Cedar. Apparently the Teak was
too dense to hold moisture.
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