Needed way less than one roll. It's about 1/8 to1/4 inch thick, around 1 inch wide, but it separates into strips 1/4 inch wide. In other words if you cut or tear a 1 foot piece off the roll, the one foot piece will make a 4 foot piece 1/4 inch wide once you separate it. You can mash with your fingers to any shape or thickness you need. It comes in a box , in around a 5 foot roll.
The way I found out about it was, I called ,The JEEPSTER MAN , Morris Ratner up and asked him if he carried the welting to go between the front fenders and the cab. He said to use Dum Gum whatever that is. I went to my local hardware store and told him what he had said and he showed me the mor-tite and said he had used it for the same thing. It's actually a pliable thick putty weather stripping that can be torn to the length as needed and applied.