Originally Posted by
zacster
I've had my can for at least 5 years and it is still fine. I store it upright. Just make sure you tighten the lid.
My first can lasted maybe 8-10 years before the contents polymerized in the can. My second can (TBH, may have been old stock) was still about 2/3 full when it did the same after 3 years.
OTOH, my current Slime rubber cement can is doing fine, although it's only about 5 years old. Still sticky, patches glued with it the other month are still holding. Half the price of the Rema and available at my local auto parts store.