M1 doesn't really degrade. If it was a sealed drum, and it wasn't stored in the rain, it ought not have water in it. It can be tested for water. But I wouldn't think twice about using it.Follow up question concerning M1 shelf life.
Customer brought us a 5 gal pail...…that won't last two pulls.
So been using our 55 gal drum, but it's a few years old. Just opened last year though.
Bad idea? I'll get a new drum if so warranted.
Really trying hard to help this guy out. Very nice guy, and we enjoy our easy to get along with customers.