M-D Building Products 06619 3/8 in. x 1/2 in. x 10 ft. Black Sponge Window Seal for Large Gaps From the Manufacturer The firm, closed cell structure of this product provides a tight, long lasting seal against air, dust and moisture. Great for automotive and marine use to prevent rattles, squeaks and vibrations. Can be used on auto doors and trucks, marine hatches, deck lids, around air conditioners and to stabilize appliances and furniture.