Re: Small Blisters

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Posted by B.B. on February 14, 2005 at 07:19:23:

In Reply to: Small Blisters posted by Richard Stock on February 14, 2005 at 07:15:25:

Posted by Bengt Blomberg on June 23, 2004 at 09:25:58:
In Reply to: Re: Small Blisters posted by Richard Stock on June 20, 2004 at 13:39:49:
Richard, what normally causes differences like this are temperature differences, mostly by sun shine. May be the oxygen system causes warmer water to stream along your starboard side.
For your small hull HotVac should be able to to clean out the stuff that causes the hydrolysis even without removing the gelcoat. At least if the yard has the newest machine which can work with 105 degrees C temperature. Then there is no need for any expensive epoxy coating. Water does not hurt sound laminate.
Regarding your friend, the hydrolysis has most probably spread to the inside of woven roving layers in the laminate.
What he is performing is a waste of time and money only.
If he can not afford a proper treatment it is better to do nothing. Especially NOT apply any kind of "watershield" The hydrolysis will accelerate only under such a coat.
Regards Bengt

: Posted by Richard Stock on June 20, 2004 at 13:39:49:
: The boat is 23feet long and the beam is just under 7 feet it has heavy bilge keels and a central keel with a skeg mounted rudder it was built in 1985.
: As a point of interest a friend of mine has his 35foot swedish built yacht ashore in the yacht club with bad osmosis, he has ground of the gel coat and daily steam cleans the hull, he has been working on it for 4 months now and it has still got about 20% moisture, however both his boat and mine are significantly worse on the starboard side, this possibly could be related to the fact that Cardiff Bay, since it has been controlled by a barrage has been fresh water and they have a large oxygen pumping system to prevent stagnation, the important fact here is that on both boats we had moorings near the oxygenation units which produce large whirlpools and bubbles near the yachts, do you think it may be a factor????

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