Which 100% silicone caulks have a long shelf life? I realize they go bad (and sometimes won't cure/harden when old) but I'm an occasional user and it would be great if what's on hand can be trusted in a pinch.
For what it's worth, I found a small tube of 10 year old, at least, previously opened silicone in a tool box and decided to test it out of curiosity. Darned thing was still good and cured up as it should. (Now if I could only find the tube to see what it was.)