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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: So that ends the White Jeffco 9700 Fuel Tank
 Sealer Saga
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Date: Wed, 15 Nov 2006 12:23:36 -0500
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Kevin Kossi <kevin@airforcemechanical.com> wrote:

>>>
  I followed Don Barns advice and sprayed the PPG epoxy white mixed  with the
clear Jeffco Resin. 50% Resin was a bit too thick, 40% was  perfect. It took
three days to fully harden but it came out perfect.  It's really white and
really strong.
>>>

Kevin,et al,

I've seen this mentioned a couple of times here and I'm wondering whether it's 
a good idea to mix dissimilar epoxy systems together.  The reason we mix 
epoxies according to a specified resin/hardener ratio is to insure that the 
matrix achieves a complete crosslinking of its molecules.  It seems to me that 
mixing two different systems together could possibly change the chemical 
characteristics of both systems, resulting in a mixture that may or may not 
meet the intended cured spcifications of either product.  Are there any 
chemists out there who would care to comment?

    <Marv>