[Public-list] Hot Epoxy in the bilge

Wed Jan 17 06:02:17 PST 2007

Would you get the same adhesion with polyester? The area is impossible to 
sand to rough up to improve adhesion, which is why I think epoxy might have 
a better bond. This is actually a question?

Mike Lehman
~~~_/)_/)~~_/)~~~

----Original Message Follows----
From: Michael Connolly <crufone at sbcglobal.net>
Reply-To: Alberg 30 Public List -- open to all 
<public-list at lists.alberg30.org>
To: Alberg 30 Public List -- open to all <public-list at lists.alberg30.org>
Subject: Re: [Public-list] Hot Epoxy in the bilge
Date: Tue, 16 Jan 2007 18:18:08 -0800 (PST)

David,
   I would think that polyester resin would do the same at less cost and 
trouble.
   Michael

Amy & David Swanson <zira at bellsouth.net> wrote:
   Rod & others -

The reason I asked about the epoxy is, like many of the older style boats,
the bilge in my boat under the engine appears to have been some type of
filler material covered in styrene resin. This resin is cracked & broken in
several places. I want to fill it to a reasonably flat/smooth surface, that
is why I was thinking of pouring epoxy in. I will probably still do this
for the broken areas, in small amounts, then brush a couple coats over the
rest. Thanks for the suggestions.

David Swanson
Strayaway Child #229
----- Original Message -----
From: "Rod Symmes"
To: "Alberg 30 Public List -- open to all"

Sent: Tuesday, January 16, 2007 7:08 PM
Subject: [Public-list] Hot Epoxy in the bilge

 > Hi David;
 > Here are my thoughts on your epoxy in the bilge questions.
 > Because I am sure you intend to spread the epoxy as a thin coating over
 > the surface of the bilge, I don't believe heat will be an issue in the
 > bilge because the thin coating will have a large surface area to get rid
 > of the heat of reaction.
 > HOWEVER..........if you will be mixing up a quart or two of epoxy in a 
pot
 > of some sort, heat will become a very serious problem. The surface area
 > of the pot will not be large enough to get rid of the heat created by the
 > chemical reaction. What's more, the rising temperature will cause the
 > chemical reaction to speed up which will in turn create even higher
 > temperatures...........I think you can see where this is going. You will
 > very quickly have a pot of goop that is too hot to hold and will set up 
so
 > fast you will not likely be able to spread it. One technique to buy more
 > time before setup of a large quantity of epoxy is to mix it in a pot but
 > as soon as you feel it is properly blended, pour it out into a shallow
 > tray to give it a greater surface area. Even so, I would prefer to make
 > several smaller batches. Even if you manage to keep the mixture at 70 to
 > 80 degrees F., your pot life could be as short as 10 minutes - it depends
 > which hardener you choose.
 > My experience with just a few fl.oz.'s in one of those single serving
 > yoghurt containers ( my favourite mixing pot for a small quantity ) the
 > heat of my hand will speed up the reaction and in a couple of minutes it
 > will feel quite warm.
 > Another tip - my instructor had a wall clock in his shop and he
 > insisted we stir the epoxy mix for 5 minutes "BY THE CLOCK" to ensure 
that
 > it was properly blended.
 > Sorry to be so long winded. Good luck with your project.
 >
 > Cheers, Rod
 >
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