Oh my gosh, much thicker than duct tapes, several layers. This was made to hold the Empire State Bldg together. This is about the equal of 3 layers of duct tape, and has a tough adhesive. It's a bit hard to tear off, carry a pocket knife. When taken off, which is very hard, it left some adhesive behind, but easily cleaned off with denatured alcohol or Goof Off. I would use this on more permanent problems, and not for temporary use. For the utility, I think it's a good buy. If using on shop stuff, home repairs, toys, outdoors where a long term and strong solution is needed, this is the one. I recommend you try it and you won't go back to regular duct tape. When it arrives, you'll notice because of it's many layers and materials, that it is a large roll per feet, and is VERY heavy....that's good.