l agree with Geri...l've used thermalon for years in placemats as well. Just to be on the safe side, l give the project a firm pressing with iron set to cotton. This "sets" the edges ( if l've knife edged instead of binding), and leaves a nice level surface for standing things on... yet the quilting shows. The added bonus is it helps protect the table from warm ( not baking hot!) platters & such.