REFLECTOR: EZ-84 hardener

[Clayton Chase]

I opened up my hardener yesterday and finally checked it out.   It wasn't
pretty.  The level was down about 4" from the top of the bucket and it was
a mess of floating light colored chips, little pellet-like material  and
mucus-like skim.   I immersed the bucket in hot water and stirred it around
a lot and things got a lot better but the 'skim' remained.  So I pulled
most of that out and threw it away.  The rest of the hardener is similar to
maple syrup in appearance but less viscous.    I made a test-lay-up and it
seems to be OK.   Since I don't have very much experience with fiberglass
I'm a little concerned that it's still a little rubbery, but it's been less
than 24 hours and most of that time has been in a relatively cool basement
of about 66 degrees.

Does anybody else have any advice for me before I make my nose gear door
flange out of this stuff and start using it on my kit?

I'm attaching some pictures, hopefully they are small enough to make it
into the e-mail.  If not you can see them all in their full size glory at:
http://velocity.claychase.com/?p=215

[image: Inline image 6][image: Inline image 7][image: Inline image 8][image:
Inline image 9][image: Inline image 10]


On Mon, Nov 19, 2012 at 9:38 AM, Ron N VelocityXLFG
<velocityxl at fastmail.fm>wrote:

>  Floating a lid on the top of the Hardener keeps the air out and will
> extend the life of the hardener.
> Worked on my hardener build for 10 years and never had a Hardener issue in
> the pump dispenser.
>
> Ron
>
> On 11/18/2012 10:51 PM, Gattenby wrote:
>
> In my experience...
> Oxygenation will turn it dark (black).  Not a terrable thing.
>
>  Cold will make it thick, crystallize / sludge.   Warmth (the hot water
> trick) can bring it back. But if you try to mix it and put it on the glass
> while it still has crystals then the layup is garbage.
>
>  Leaving it in plastic containers will let the solvent leach out and it
> will get gummy and is bad. It happens fairly quick ( few months). Faster if
> you keep it heated.
>
>  Transfer it when it's new to glass or metal containers and it will last
> a few years.
>
>  I've tried to use some of the old gummy stuff on non structural things.
>  It doesn't wet out as well, it takes longer to cure, and when you try to
> drill a hole in it the glass frayed.
>
>  Recommend mixing a batch and do a several layer test strip.  If it dodgy
> then I wouldn't use it
>
>  Just my 2 cents worth.
> The bottom line (pun intended) is
> When it's flying would you trust your bottom on that lay up?
>
>  Noel
>
>
>
>
> On Nov 18, 2012, at 2:11 PM, Glenn Falkenberg <airmech2 at gmail.com> wrote:
>
>   Is it normal for EZ -84 hardener to get lumpy. I have my epoxy box temp
> set at 70 degrees. Is this normal or is it going bad?
>
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