I have all of you beat! I just opened a 17 year old roll of Monokote red! It had the old wrapper printed with brown ink instead of the current multi-colored wrapper.
It went on fine, and even though it felt a little stiff, worked around the nose of my Sig S.E. just fine. It stuck, stretched and shrunk just like you would expect. The color is still even and it's just as shiny as any of the current material. It even smelled right
John