I hadn't ever know that about hardener.  No wonder...

Thanks,

Mike

On 1/20/05 10:21 PM, "David Beierl" <dbeierl@ATTGLOBAL.NET> wrote:

> At 08:16 1/19/2005, jimt wrote:
>> a project.  4 days later it still hadnt hardened up correctly.  Even after
>> an almost double amount of hardner.  Threw those tubes out and went to
>
>
> Hi Jim --
> Double hardener (with any epoxy) is an absolute guarantee that it will
> never harden; even a few per cent extra can prevent hardening -- consider
> the recommended amount as "never-exceed" and aim a bit shy of it so that
> the margin of error of your measurement won't exceed the
> recommendation.  If you use too little it will cure slowly, but
> fully.   Too much ends up rubbery forever.  Since the hardener usually
> dispenses more easily than the resin, it is very easy to get too much and
> think it's equal.  I struggled with epoxy for years until my father taught
> me to draw out the resin in a uniform shape and mark it for the correct
> proportion (we use some stuff that's 1:5), then carefully go a bit shy of
> that with the hardener.  Nary a problem since -- but I would have sworn up
> down and sideways that I had the amounts correct before.  Oh...on the
> syringe-type dispensers I press mostly on the resin side, and if a little
> too much hardener comes I suck it back or otherwise remove it.
>
> david
>
>
> --
> David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
> '84 Westy "Dutiful Passage," '85 GL "Poor Relation"
>
>
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