Originally Posted by Triple_Se7en
You left-out important info and even more important, where does this cleaner live? At least name your state? Can never understand why normal, law-abiding members hide this.
Where was this concentrate stored for 2.5 years. Did it's home (garage, barn or metal shed) see temp and humidity extremes?
A little harsh (but I agree - state/location in general is MASSIVELY helpful in most advice scenarios). The really big question is - was it opened or the foil still intact? If sealed, then go forth with God and no worries. If opened, but with a compound that is still very stable like PEA, you might still go forward but realize some of the lighter aromatics might reduce it's immediate miscibility in the tank. But still good.