Cracks and gaps around windows and doors can cause drafts to come into your home leading to high heating and cooling costs. Large Gap Self-Adhesive Duck Brand Heavy-Duty Weatherstrip Seals are made with durable and flexible material allowing them to stand up against extreme temperatures that cause other seals to freeze or crack. They are a great solution for replacing old or worn door and window seals forming a barrier against the outdoor air as well as dust pollen and insects during the warmer months. Use together with other Duck Brand weatherization products to make your home more comfortable and energy efficient all year long.