Seal and Insulate with ENERGY STAR is guidance from the ENERGY STAR Program on ways to improve the envelope (or shell) of your home by sealing air leaks and adding insulation. Sealing leaks and adding insulation can make your home more comfortable and energy-efficient which can lower your utility bills. It can also make your home quieter by reducing outside noise and can help prevent pollutants, such as pollen and car exhaust from the garage, from entering your home. Making these improvements can save you up to 10% on your annual home energy bills. Learn more about Seal and Insulate with ENERGY STAR.