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

Subject: Re: [baidarka] It's a wet boat. :(
From: George Parsons (GHParsons@msn.com)
Date: Sun Jul 25 2004 - 19:34:02 EDT

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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