REFLECTOR: Hardening Hardener

Scott Derrick scott at tnstaafl.net
Sun Jul 26 08:15:28 CDT 2009


Larry,

I think you may be right.  I've never had any hardener go thick here in
New Mexico in the last 5 years. Maybe a dehumidifier in the heat box
would help?

Scott

milehitaz wrote:
> Seems to me Humidity plays a big part in the hardener turning into the
> crystal and goo. First 3 years i had my project I lived in Lake Tahoe,
> all my epoxy lived in a hot box kept about 90 to 100 and was always
> fine. Last 5 years I have been on the coast in Oregon and the stuff
> seems to turn in less than 6 to 8 months if I haven't used it and it
> lives in the same Hot Box at the same temp. Tahoe is low humidity
> area...Pacific North West is very cool n damp. I reheat the stuff with
> a heat gun and it comes back ok but I didn't use it in critical areas
> like when assembling the strakes.
> Always used test batches before any of it was used on the project.
> Good luck,
>  
> Larry
>  
>  
>  
> In a message dated 07/25/09 17:23:20 Pacific Daylight Time,
> gattenby at tulsaconnect.com writes:
>
>     EZ84 ordered from spruce, comes in metal cans.  That seems to help
>     with the aromatics, but it still seems to turn dark.
>      
>     As far as the thick goo...  heating seems to restore the viscosity.
>     Every spring before I start working again,  I do a few "test"
>     baches while I clean the pump.
>     If the test strips and the leftovers in the cup get hard...  I use it.
>      
>     Several test that I've heard over the years are...
>     if you can drill through the layup without the edges fraying...
>     If you can't scratch the leftover in the culp with a fingernail,
>     but can with a real nail...
>     then the batch is ok.
>      
>      
>     Noel
>      
>      
>     On Sat, 25 Jul 2009 16:46:23 -0500
>      Brian Michalk <michalk at awpi.com> wrote:
>     > I'm wondering if the epoxy should be stored in something
>     >other than
>     > plastic to keep the aromatics.
>     >
>     > I am trying glass canning jars.  It will take a few
>     >years to know for sure.
>     >
>     > Brooke Wolf wrote:
>     >> I know this has been addressed before on this forum, but
>     >>I am  having a
>     >> problem with hardening hardener.
>     >>
>     >> All of my hardener is less than 2 years old.  It is from
>     >>the Velocity
>     >> Factory.  I keep some hardener in a 85 deg box.  I have
>     >>been away from
>     >> my project for 3-4 months.  Now, I noticed that it is
>     >>getting a little
>     >> thick, somewhat like a gooey tar.  I  tried heating it
>     >>by putting the
>     >> gallon jug (with less than a quart of hardener in ! it) in
>     >>water at 150
>     >> deg.  I let the hardener get to about 130 deg for about
>     >>15 minutes.  The
>     >> heating certainly made it more viscous, but as it cooled
>     >>it got a little
>     >> thick again.....but not as thick as before.  I don't
>     >>have much
>     >> confidence in the heating trick.  What did I do wrong?
>     >>
>     >> Just for grins, I checked on two jugs of hardener which
>     >>have been
>     >> sitting in my basement for 2 years.  The temp down there
>     >>stays a pretty
>     >> constant 70 deg.  Much to my chagrin, both jugs seem to
>     >>have solidified
>     >> into a crystalline mush.  Any ideas?!!
>     >>
>     >> Brooke
>     >>
>     >>
>     >>
>     >>
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