On Mon, 3 Apr 2006 12:29:22 -0500, (Gene) wrote:

I've got a bottle of Gorrila glue that is getting old and very thick.
Anybody know of a way to make it run again? Maybe a microwave oven or
something?

Throw it away and buy a new one.
These adhesives are based on urethane and are moisture (in the air)
catalyzed. Thus, the stuff you have is partially cross-linked
so-to-speak and that cannot be reversed -at least not in the shop.
If you were to run a test using this bottle and a new bottle you would
find that the old one has diminished bonding properties.