On Sep 14, 5:56 pm, "Toller" wrote:
I have the better part of a gallon of West's epoxy that is maybe 3 years
old. The hardener had turned brown.
It seems to work just fine.
Is it okay to use, or has it been compromised?

West Systems hardener will turn redish brown when exposed to moisture.

As per their website:

"PROBLEM: Hardener has turned red after several years storage.

POSSIBLE CAUSES & SOLUTIONS:

Moisture in contact with hardener and metal container.

Red color is a normal condition. It will not affect epoxy handling or
cured strength. Avoid using for clear coating or exposed areas where
color is not desired."


Been there, got that.