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Date: Tue, 2 May 2000 01:11:38 -0400
From: Marvin Kaye <74740.231@compuserve.com>
Subject: Working on the brace mod
Sender: Marvin Kaye <74740.231@compuserve.com>
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          <<  Lancair Builders' Mail List  >>
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>>
Claudio, the 100:44 ratio (actually 100:44.5) is for Hysol structural
adhesive, not Jeffco epoxy.  The Jefco ratio is 100:25 by weight, 100:26 by
volume (I think... I'm not home now, this is from memory.  Check the
containers carefully, the real ratios are listed on the labels.)  I use a
sticky stuff dispenser with the proper ratio down in Fort Myers and know
that I can regularly get more than 10 minutes out of my Jeffco mixes.

Once you've reverified the ratio you should try mixing the material in a
larger container, one that allows the volume to spread out a bit.  You
should be able to use the unwaxed cups that come with the kit without any
problem with all but the really large batches.  The folks at Jeffco
suggested to me some time ago that when you're mixing a large batch you
should do so in the usual container and then transfer the fully mixed
material to a cookie sheet that has been lined with foil.  This allows the
material to spread out into a very thin layer which is far less prone to
exotherm, and will extend your working time considerably.  Generally, if
you can keep the depth of the material being mixed to 1/4" or less that
should help quite a bit.  That's why it's better to mix your flox or micro
into a smooth layer around the walls of the cup rather than in a big ball
at the bottom of the cup... less chance of exotherm.  When all else fails
mix smaller batches and you should be ok.

Additionally, I believe that Lancair has put their blessing on the Jeffco
slow catalyst, and using that in the warmer climes should really make
working with this epoxy system much easier.  Check with the factory just to
be sure, then let us know what you find out.  (I'd really like to switch to
the slow catalyst for this summer myself, as working in the 90 degree
Florida heat with the regular catalyst really tests my patience.)
 
   <Marv>
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LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.
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