I have two five gallon buckets of Sherwin Williams PVA Drywall Primer & Sealer which is about a year and a half old. One is a partial bucket and the other is sealed and has never been opened.
I just opened them and they both have two small colored areas separated and floating near the top. One is orange and the other is green:
I assumed that it was mold when I opened the partial bucket, but when the unused bucket had it too, I started to wonder if this was normal.
Is this primer bad or can it be used like it is?