Even small cracks and gaps around windows and doors can cause drafts that lead to high energy costs. Duck Brand Silicone Draft Seal helps to fill those gaps, keeping cold air in during the summer and warm air in during the winter. This door seal is made from high-quality silicone material that is flexible, durable and resists cracking and hardening - plus, it's transparent for discreet seals that blend into the home. Draft seal is easy to install around doors, door bottoms and windows, and the strong adhesive sticks to most surfaces.