DottyMo, thanks for the advice. I haven't used the mat since the crack occurred. If the crack proves to be a problem, I decided I would cut it up and use the pieces. I think that using the Duck tape will be the best solution. Let's hear it for Duck tape! I plan on splurging and buying one of the "fancy" designer rolls. Maybe hot pink or a leopard. Can't have this old mat that has served me well fixed up with drab gray even though it will be on the back!