REFLECTOR: EZ-84 hardener

[Gattenby]

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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