Re: [baidarka] It's a wet boat. :(

Subject: Re: [baidarka] It's a wet boat. :(
From: MICHAEL SILVIUS (M.Silvius@worldnet.att.net)
Date: Sun Jul 25 2004 - 20:53:15 EDT

   IMO Water based poly urethane technology is just not up to speed
yet.(note the operative word is YET) And in so far as I have seen in the
industry that seems to be the consensus.
As someone who refinishes betwen 18 to 20 thousand sq ft of hardwood floors
a yr I can tell you for first hand experience. Water based PUs are not any
were as durable and become brittle much sooner.
I will not use it unless a client absolutely demands it. I have used it and
regereted it multiple times. And had to go back and re-do floors becauce of
it.
Oil based PUs retain more flexibilty and contain more solids. The higher
gloss have the highest solids content, and will yield the best results in
terms of durability, UV protection, and water impermeability.
Yes they are smelly, and impply more polution and or waste, but longer life
of oil base will compensate for this. Use disposable brushes and don't
bother w/ solvents if polution is an issue.
just my two pennies worth,
michael.

----- Original Message -----
From: "George Parsons" <GHParsons@msn.com>
To: <baidarka@paddlewise.net>
Sent: Sunday, July 25, 2004 7:34 PM
Subject: Re: [baidarka] It's a wet boat. :(

> Bruce
>
> I used waterbased PU on my first SOF boat. It also seeped until I used
two
> coats of conventional PU over the waterbased stuff. Stopped the problem
> immediately and that was 4 years ago with no further coats or blistering
or
> peeling.
>
> I could tell it was seepage and not condensation because I was paddling in
> salt water and a taste test of the beading liquid told me it was salt.
>
> George
> ----- Original Message -----
> From: Bruce C. Anderson<mailto:bcanderson@cableone.net>
> To: baidarka@paddlewise.net<mailto:baidarka@paddlewise.net>
> Sent: Sunday, July 25, 2004 11:03 AM
> Subject: [baidarka] It's a wet boat. :(
>
>
> Howdy
>
> I spent a little more time in my West Greenland Kayak yesterday. That
was
> the fun part. The not so fun part was that she "seeps". Or at least
> that's
> what it seems like. She's a wet boat.
>
> The first time I took her out, water got inside the boat from holes
pulled
> in the fabric along the stitch line. I took 1/4" strips of fabric and
> using
> the water based urethane that I treated the boat with, covered those
holes.
> I also added another coat of urethane to the whole boat.
>
> Yesterday she didn't take as much water as the first time, but there was
> about a pint of water in the boat at the end of the paddle, about 5
hours.
> I noticed that when I put her on the roof rack that the skin was slack.
A
> sure sign that the nylon fabric is not impregnated with urethane. I've
got
> maybe 4 or 5 coats on the outside, but didn't treat the inside since I
> assumed that during application the urethane would soak through the
fabric,
> and so thoroughly impregnate the fabric sealing it from the inside as
well
> as the outside.
>
> That doesn't seem to be the case. The sad news is that when I did a
sample
> test with this fabric on 12x12 frame using a solvent based urethane and
the
> fabric did get thoroughly impregnated. :) Then I read that water based
is
> better for sealing, so I used water based instead. :( Perhaps the
> difference between what was recommended, and my results is that I did
not
> use raw nylon. I used a nylon that was already colored.
>
> I am considering dumping some solvent based urethane in the inside an
> sloshing it, but I don't know if the solvent based is compatible with
the
> water based. Does anybody know if there will be some sort of
interaction?.
>
>
> Has anybody else had this problem? If so what did you do to cure it?
>
> Thanks for your help,
>
> See Ya
>
> Have Fun
>
> Bruce (wet in Arizona in the middle of a drought!)
>
>
http://myweb.cableone.net/bcanderson/
> >
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