I can personally swear that I have a bottle of this Krazy Glue brush-on that I opened a full year ago, which is still perfectly usable.  Running out of cyanoacrylate adhesive is a thrilling new experience for me, as I'm used to the tubes being basically one-use -- as soon as you stick a pin in them, they turn into rock in a week.  The color change feature is a nice bonus too.