Another way of giving a distinctive look to a door or a window is to add fake mullions (SDL) on the glass surface. These fake mullions measuring 13/16'' (34), 1 1/8” (118) or 1 5/8” (158) in width are glued directly on the sealed unit with tape especially developed for this application. These fake mullions may be applied only on the outside glass surface or on both sides of the unit. The addition of an integrated muntin bar that is aligned with the mullion greatly improves the esthetic aspect of the windows and doors set.