Reflectix Sill Sealer is expertly designed to minimize air leakage between the foundation wall and the sill plate, making it an essential component for both residential and commercial construction projects. This versatile product can also be used to seal around window and door frames, enhancing the energy efficiency of your building. Made from ribbed polyethylene foam with a total thickness of 3/16", it is suitable for use in slab-on-grade foundations, crawl spaces, and basements. Reflectix Sill Sealer durability and reliability backed by a 15-year limited warranty. Available in multiple sizes—3-1/2", 5-1/2", and 7-1/2" widths, each roll measuring 50 feet in length—this product ensures a fit for your sealing needs. Model Number: