Weatherstripping is a great way to conserve energy and save on utility bills. Did you know you could save up to 10-Percent on your energy costs by properly sealing and insulating areas around the home? Duck brand sponge foam weatherstrip tape is a self adhesive insulating tape. 5/16-Inch thick tape is great for medium gaps around doors and windows. This sponge tape seals out drafts and humidity, dust, pollen and insects. Value pack contains two 3/8-Inch wide by 10-Feet rolls of sponge foam tape.