"SafeMag - 0.8 mil Magnetic Sheeting (Vehicle Grade) SafeMag™ is a unique backcoated flexible magnetic sheeting. The backcoating is a safe barrier between the magnetic surface and the surface to which it is applied, which is an important new benefit to sign makers in applications like vehicle signs. The backcoating is equally important to screeners where “blocking” is a problem when printed magnetics need to be stacked during the printing process. "