03-01-2024, 03:08 PM
Others may weigh in on this as well, but from what I know, it depends mostly on how environment-controlled that shelf is.
In an air-conditioned basement, low on moisture and not hot from the sun, it presumably can last 10-15 years, powder mostly. Primers I haven't seen anything on, but I'd imagine they are the same.
Powder that has gone bad seems to present itself as either bulging cannisters or a bad smell when you open it.
I have some powder that is 10, maybe 15+ years old, from the early 2000's, mostly h414/760 and some blc-2, mainly b/c I don't use them as less temp-sensitive alternatives are available. But the 1 or 2 cans of blc/760 I've opened, they seem to be ok as far as smell and no bulging. I do have a little bit out in the garage but temperatures there don't get above 90 mostly... if I ever had to use them I would do the smell test first.
Don't know if this helps or not. Primers don't stay around long enough for me to worry about them. I always store them in A/C.
In an air-conditioned basement, low on moisture and not hot from the sun, it presumably can last 10-15 years, powder mostly. Primers I haven't seen anything on, but I'd imagine they are the same.
Powder that has gone bad seems to present itself as either bulging cannisters or a bad smell when you open it.
I have some powder that is 10, maybe 15+ years old, from the early 2000's, mostly h414/760 and some blc-2, mainly b/c I don't use them as less temp-sensitive alternatives are available. But the 1 or 2 cans of blc/760 I've opened, they seem to be ok as far as smell and no bulging. I do have a little bit out in the garage but temperatures there don't get above 90 mostly... if I ever had to use them I would do the smell test first.
Don't know if this helps or not. Primers don't stay around long enough for me to worry about them. I always store them in A/C.