Gaffer's tape is cloth tape (black, in my experience) used by "gaffers" (lighting tech's) to tape down cords and equipment on scene- either in the theater or in movie production. It has the great advantage of being removable from most surfaces without damage to the finish.
Originally Posted by leicam5
I have used it to fix bellows before but I would either use bookbinder's tape (thinner) or liquid electrician's tape (rubber) in the future. The gaffers tape is a bit thick and sort of moves around some in hot weather.
Oops... Peter beat me to it. So did Randy!