We have all seen old, yellow, door light frames. The door light frame is what holds the glass in place in your door system. Dorplex’s frame is made of a strong foam PVC material that resists warping. It is made of a non-yellowing material and comes with a screw cap cover to hide the fastening screws. The frame is sealed with three co-extruded seals that do not require sealant, which tends to ooze out when heated.