From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: Epoxy pump AR-100
To: lml
Date: Sun, 06 Apr 2003 21:52:43 -0400
Message-ID: <web-2105221@logan.com>
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> OK Marv, makes sense to me. Could you tell us what wt:wt ratio do you use?
I
> assume it the same as the vol:vol ratio but I'd like conformation on that.


 From the Jeffco Products website:

"100% solids, two component, epoxy laminating systems with excellent wet out, 
low viscosity and high strength. Easy to use 4:1 weight or volumetric mixing. 
Choose between fast (JEFFCO 3102), medium (JEFFCO 3103) or slow (JEFFCO 3156) 
systems. 100% solids. "

suggests that 100:25 is proper, but if you read down a bit further (into the 
tables) you'll discover that the recommended ratio by weight is 100:22, and 
that's what I've been using religiously for the past several years.  I've 
never had a problem of any kind and am very satisfied with all of my layups. 
 Mixing at 100:25 I have experienced a lingering stickiness to the external 
surface of layups, but I never get that with the 100:22 ratio.

BTW, I've also been using a different slow catalyst that has much higher 
strength numbers than that which is sold by the factory (3156), especially for 
larger layups, also at the 100:22 ratio by weight.  Look up their #3179... 55 
minute max gel time (vs 30 minutes max for 3156, a big issue in the FL heat), 
much lower viscosity than 3102 or 3156, so the system when mixed wets out 
layups a bit easier.  It's great for large layups that I start to work on 
later in the day and can let cure all night.

Hysol ratios are all listed by weight anyway, so the 100:44.5 is correct.

      <Marv>