Stanpro SealStrip Rubber Tape Glass Set, .025" x 1-1/2" x 100' roll. Just fold SealStrip over the edge of the glass, insert in metal frame or channel, and trim with knife or razor blade. The job's done. SealStrip holds glass firmly and seals against dirt, moisture and weather, as well as providing insulation against sound and vibration. SealStrip is preferred for vent work because it turns tight corners easily, yet won't stretch out of shape, and it's thin enough so that it won't crowd the glass to cause cracking or breaking.