[Public-list] blister repair

[dickdurk at atlanticbb.net]

Hi Larry

Or...

get a couple needle/syringe sets from the Pharmacist. I 
think my size was 28 or 30 guage-they are for horses (a 
veterinarian size). Grind the insetion end bevel flat with 
a whetstone.

Drill two holes vertically in each blister-just until 
brown goopy stuff squirts out- with a drill size that 
matches the syringe. Flush with solvent of choice-I used 
acetone, but there are some blister theories that say 
acetone is the cause of the blisters;which I don't buy 
because acetone is too volatile to stick around for 40 
years.

Anyway, squirt thickened polyester resin into bottom hole 
until it comes out the top hole. Seal hole with even 
thicker thickened resin. Let dry. Grind smooth.

You end up with a solid plug mechanically attached to the 
hull.

On my boat, the blister formed a fraction of an inch from 
the surface. These Alberg hulls are something like an inch 
and a half thick, I know it is hard, but you don't need to 
lose any sleep over your problem.

There you have two approaches. There are more.

MichaelGrosh
#220

   
On Tue, 22 May 2007 15:35:16 -0700
  Randy Katz <randyk at bertschi.org> wrote:
> Greetings, Larry,
> 
>    I've done this on my boat.  I can't tell you how much 
>anxiety I had
> about this as a new boat owner-- thought my boat was 
>rotting away, it'd sink
> in the first big blow.  In nearly every case, though, 
>this is a simple and
> minor task to repair, and it doesn't indicate that the 
>hull is "bad." I now
> understand that having been through it.
> 
> I grinded out the blisters using a grinder with 
>sandpaper disk (coarse).  I
> went through the outer layer of fiberglass (mat?) to the 
>woven layer-- it
> was about an eighth of an inch or so.
> 
>    On my 1967 boat it appeared that whomever laid up 
>that first layer (the
> layer that went against the gel coat inside the hull 
>mold) did a pretty
> uneven job of wetting it out.  I understand that the 
>quality of layup varies
> quite a bit from vessel to vessel, perhaps depending 
>upon the diligence of
> the college kids they'd hired that summer.  (See Daniel 
>Spurr's book HEART
> OF GLASS for intriguing details regarding the earliest 
>fiberglass boats:
> http://www.amazon.com/Heart-Glass-Fiberglass-Boats-Built/dp/0071435468/ref=s
> r_1_2/t/102-1555575-9954530?ie=UTF8&s=books&qid=1179873147&sr=1-2)
> 
>    It's recommended to wash that area with hot soapy 
>water and let dry as
> long as possible.  I rinsed with fresh water, dried for 
>a few days.
> 
>    West System epoxy with filler material-- I forget the 
>number, but I used
> the kind that was higher adhesive level. (They have a 
>very good booklet on
> doing exactly this kind of repair-- costs $3 or so).  I 
>filled leaving a
> slight indentation.  Added a second, finer coat 
>(thinner) later, and sanded
> a little.  The stuff sets up like rock so being careful 
>first time around is
> worth it.  Keeping sanding to a minimum is worthwhile 
>for health reasons.
> 
>    Don't even think about doing this work without a good 
>mask/respirator--
> the fiberglass dust and, especially, the epoxy and 
>solvents, are very bad
> stuff.
> 
>    I applied bottom paint over that.  The repairs have 
>held perfectly for 6
> years so far with no sign of deterioration.
> 
> Hope this helps,
> 
> Randy Katz
> #249
> Seattle/Bellingham WA
> 
> on 5/22/07 1:49 PM, 
>public-list-request at lists.alberg30.org at
> public-list-request at lists.alberg30.org wrote:
> 
>> Message: 6
>> Date: Tue, 22 May 2007 12:26:45 EDT
>> From: LDGCYBERNET at aol.com
>> Subject: Re: [Public-list] Blisters
>> To: public-list at alberg30.org
>> Message-ID: <c4f.15ceec63.338473c5 at aol.com>
>> Content-Type: text/plain; charset="US-ASCII"
>> 
>> We have a few quarter size blisters on the bottom. Any 
>>suggestions regarding
>> repair.
>> 
>> Larry
>> #276
> 
> 
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