Did the epoxy go bad?

[DC932]

About this time last year, I sprayed white epoxy on a blasted panel. This year, using the same batch (i.e. from the same can) of white epoxy, I did a small repair and brushed it on over two days allowing it to dry between coats. It was mixed with catalyst but stored in sealed container while the first coat was allowed to dry a little.

I noticed that the epoxy that was recently brushed on has a slightly yellowish/darker tint than the epoxy that was sprayed a year ago. Is this just a result of it being mixed with catalyst and allowed to sit in the pot for 24-48 hours before being applied?

The epoxy appears bright white before being mixed with catalyst. I made sure to mix 1:1

 

[Barry]

No, its fine but once you open the activator, as it is stored the activator will over time turn from a watered down root-beer color to a dark root-beer color, normally you would never see the difference with the exception being white.

 

[DC932]

Thanks!