MaxSeal Tailgate Seal can be used with any tonneau cover purchased at Tonneau Covers One. It creates a tight seal along the sides and bottom of your tailgate. Extang Maxseal Tailgate Seal can be found retailed by many auto accessory shops. Extang does stand behind the products they manufacture and is one of the top brands within the tonneau cover market today. Fits Ford, GMC, Chevy, Dodge, Toyota, Nissan, and more.