I've heard that water based sometimes gets moldy, other than that, or freezing, I'm not aware of an issue.
I have some colors of Permaset that are around 3 years old and work fine.
Have you stirred the "large tub" as you've been using it? Possible, I suppose, that the components separated to some extent, don't know.
I have some colors of Permaset that are around 3 years old and work fine.
Have you stirred the "large tub" as you've been using it? Possible, I suppose, that the components separated to some extent, don't know.