An edge trim for display cases, and methods for making edge trim, are described. Instead of using tape or an adhesive to attach trim to the outer rims of end panels, a shape pattern is created in an extruded trim piece. Then polyurethane liquid can be added to the interior of the panel so that it also fills in the shape pattern. When the polyurethane solidifies into foam it will create a tight bond between the panels and the trim pieces.