There is now an alternative to using the fabric material placed under seams before gluing. The 12-inch wide scrim is completely porous which allows the glue to form an excellent bond to the backing. This product is made out of a fiberglass type material so it is extremely flexible and strong. Available sizes: 1″, 2″, 6″, 12″ (optimal for long seams). Other sizes can be used for small patches and logos.