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 uncured resin on keel
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weluvlife
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Initially Posted - 11/02/2005 :  20:47:20  Show Profile  Visit weluvlife's Homepage
Maybe someone can help me here?
For some reason I decided to use some left over
polyester resin on my keel after sanding down.
I figured it would help seal the many exposed
areas of metal. Well, I either did not add
enough hardner or I simply had old/bad product.

The resin is still tacky after 2 1/2 days.

What should I do? What can I do? I've thought of adding
a very "hot" mix of resin and painting it over this? No?

Any suggestions would be very helpful.


Mark Eichman
Lake Don Pedro,CA
www.lakedonpedrosailingclub.org
'86 c25 TR, SK

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Leon Sisson
Master Marine Consultant

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1893 Posts

Response Posted - 11/02/2005 :  22:03:36  Show Profile  Visit Leon Sisson's Homepage
Mark E,

Let me start by saying I no longer use polyester resin except for gelcoat. What you have there is a fine example of one of the many reasons why I quit using it. Of the various polyester resins out there, some are intended for lay-up, a.k.a. laminating resins. Others are intended to produce the final hard exterior surface, such as gelcoat. Laminating resins are deliberately formulated <b><i>not</i></b> to harden quickly, thus encouraging a strong primary chemical bond between applications. It sounds like that's what you used. Now, one can use laminating resin to produce a hard finished surface by either adding 'surfacing wax' to the pot, or by applying PVA to the resin just after it has been applied. (<i>I think the long spelling is something like 'polyvinyl alcohol' -- industrial strength hair spray with a tint.</i>)

Now as for "<i>What should I do? What can I do?</i>" You could try mixing up another batch of whatever you've got there, and either stir in lots of surfacing wax, or coat it with PVA. What I assume you'd like to avoid is having to remove the mess you've got on your keel now. And no, I'd resist the temptation of "adding a very 'hot' mix of resin." you would likely end up with a suddenly coagulated lumpy, sticky mess on your keel if it didn't catch fire in the pot first.

I hope someone with more (and happier) polyester resin experience than me will add their suggestions as well.

-- Leon Sisson

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weluvlife
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Response Posted - 11/03/2005 :  13:44:42  Show Profile  Visit weluvlife's Homepage
Hi Leon,

Thanks for the reply. What is the "surfacing wax" you speak
of and what could this be mixed in with??

I need to learn more of this "pva" product.

Thanks,

Mark

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weluvlife
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Response Posted - 11/04/2005 :  18:08:41  Show Profile  Visit weluvlife's Homepage
ok, I looked up PVA and surfacing wax on the web. There is a lot of information on these products. At least I do have some options.

How about the option of just letting it cure over time? Will it eventually harden up enough to paint over it with Interprotect 2000 ?

Should I paint Interprotect over it before it is completely dry?


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