Air Sealing is the process of closing any cracks, gaps, joints, and other openings around your home. Many times, air sealing your attic, basement, and air ducts are the most effective because of the air leakage that occurs in such areas. Dr. Energy Saver uses their exclusive ZYP Foam, which is a low pressure one-component polyurethane foam sealant designed to seal, fill, bond, and stop air infiltration in areas where a fire block product is required. Sealing these small, hard to reach areas make a huge difference in how much hot or cold air you are producing and keeping in your home.