Apologies. There`s a misprint in my posting below; measured density of
Expancel was 3.16 lbs/gal (or 2.65lbs/US gal for comparison with Superfil).
Duncan McFadyean
-----Original Message-----
From: ami mcfadyean <ami@mcfadyean.freeserve.co.uk>
Europa club <europa@avnet.co.uk>
Date: Friday, January 05, 2001 9:10 PM
Subject: Re: SuperFil vs. Expancell...
>
> Poly-Fiber quotes
>>Superfil at 3.7lbs/gal.
>
>>Shaun Simpkins
>>A207
>
>
>Thats incredibly heavy.
> For comparison, water is 10lbs/gallon (imp) or Blue foam 0.32lbs/gal
(more
>than ten times lighter than Superfil!).
>Expancel can be mixed at 1.16lbs/gal but is fun to apply at this density
>(the recipe for which is 17ml epoxy + 15ml fume silica + 17ml Q-cel + 120ml
>Expancel. All volumes are bulked/loose. High-shear mixing needed (strong
>wrists) until putty-like and the placed filler "sealed down" with a hot
>spatula before it sets).
>
>Primer-fillers are typically 20 to 25 lbs/gal (dry film density).
>
>The moral is that the foam cores need to be perfect to avoid having to fill
>any more than necessary and the use of primer-filler should be minimised.
>
>Duncan McFadyean
>
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