|Sep 17, 2011, 01:55 AM|
Is old epoxy okay to use?
Got some 20 minute Finish Cure that's been sitting around for a long while. The hardener has turned a VERY dark yellowish brown. I've got a test batch setting up right now...assuming it cures okay, is it okay to use? I just want to make sure it doesn't set up more brittle when it gets old.
PS...I'm using it to glass the center section of a wing.
|Sep 17, 2011, 10:49 AM|
I'd say if it kicks your good to go. The West Systems hardener turns dark over time too. But it still works just fine. Just makes brown parts.
|Sep 17, 2011, 11:29 AM|
Your test will tell. Sometimes old epoxy doesn't cure and it stays gummy or tacky even though it has set up to a firm state.
My thoughts, ... if in doubt and it's a small quantity, ... replace it, ... if it's a gallon, ... pray.
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