The Everbilt waterproof seam tape is used to seal joints, wall-to-floor connections, and wall-to-floor changes in planes in your shower area to prevent leaking. This Everbilt waterproof seam tape is made from the same lightweight, waterproof material as the Everbilt waterproof wallpaper membrane and is best used over horizontal and vertical seams. The pliable, polyethylene material provides high rigidity and durability, making this seam tape top rated for steam shower applications. Its high-performance fleece webbing securely bonds the membrane using modified thin-set mortar prior to the installation of tile or stone in your shower space. Press the seam tape firmly into modified thin-set mortar using a flat, putty knife for a smooth appearance. Available in a 4.8 inch x 66 ft. roll. Thickness 0.01 in.