Re: Houseboat Blisters


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Posted by B.Blomberg on May 24, 2000 at 14:25:45:

In Reply to: Houseboat Blisters posted by Allan Banaszak on May 21, 2000 at 22:36:17:

: I have 50' Gibson houseboat with multiple blisters about 1 to 2 inches in diameter. I have several people advising me as to what to do. I have cut open the blisters and they have been drying for about 5 to 6 weeks, I am told I need to fill them as soon as the moisture content drops in the haul. Help me, am I doomed to miss this whole boating season, as this haul is not drying out at all?

Hello Allan.],
Drying of a polyester laminate which is going back
into the water has really no sense! Even if it is
epoxy coated, the laminate in short time will
absorb is normal amount of water again.
Now it is not the water which causes the damages
and the blisters even if a very small amount is
needed for the hydrolysis. It is the acid formed
in the hydrolysis which is the reason for an endless
chain reaction. Without removal of the acid anything
else is just a vaste of money.
So far the HYAB Osmocure is the only available
treatment which can perform this task and due to
the extensive and expensive training of operators,
the worldwide expansion takes long time.
As long as no sufficient treatment is available in
your area (note, that it is not possible to wash
out the acid as recommended by some sources. The
phthallic acid is not water soluble.
Epoxy coating just causes faster deeper not visible
damages instead of early warning blisters.
The best way to slow down the hydrolyse avaiting
a proper repair is to just sand the blisters open
or still better remove the whole gelcoat and apply
antifouling only. Allowing water to enter freely
into the cavities caused by the hydrolysis slows
down the process substantially!
Please e-mail your position so I can tell where
and when a HYAB Centre will be available.
And don't let anyone scare you into not needed
treatment. They only want your money!
Another 5 years will not make a suitable repair
more expensive.


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