J Burns wrote:

What's the definition of contact cement? Isn't it what will stick to
itself after drying on two surfaces? Naturally, they aren't all the same.

Whatever you want it to be. Yes, what is sold as rubber cement and contact
cement are usually based on synthetic rubber, latex or neoprene, in a
solvent of some sort. Yes, if you put stationery store rubber cement on both
surfaces it will adhere to itself, although it's commonly just spread on one
surface. So as far as that goes it's semantics.

However if you're mounting photos in your scrapbook and you want a temporary
bond and use DAP contact cement, you will be disappointed. Similarly if
you're laminating a formica countertop and stop by Staples for a bottle of
Elmer's rubber cement you're not going to be too happy either.