[Public-list] Hot Epoxy in the bilge

Thu Jan 18 16:22:09 PST 2007

David -

Well, ideally I would like to seal it off & smooth it out.  I figured that 
the only time I had a chance to clean it & rough it up would be while the 
motor is out.  I figure out I can't make it any worse.

David Swanson
Strayaway Child #229

----- Original Message ----- 
From: "David Fisher" <liquid_addiction at hotmail.com>
To: <public-list at lists.alberg30.org>
Sent: Thursday, January 18, 2007 6:33 PM
Subject: Re: [Public-list] Hot Epoxy in the bilge

> Hi David, are you adding the epoxy to repair the area, or just to get a
> smooth surface?  If you aren't able to get in to grind out the existing
> cracks and crazing, my experience is that any epoxy added will end up
> cracking too.  Can you get into the area to get it properly cleaned up and
> keyed to take the new surface?  Access to this part of the boat really 
> isn't
> an Alberg strong point.
>
> Cheers,
> David, Kalitsah 440.
>
>
>>From: "Amy & David Swanson" <zira at bellsouth.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 21:13:24 -0500
>>
>>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" <harmony at aztec-net.com>
>>To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
>>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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