The Everbilt Waterproof Membrane Seam Tape is a durable and versatile underlayment roll made of polyethylene material. With a length of 66 ft. and a width of 4.7 inches, this seam tape is designed to provide a waterproof barrier for commercial flooring installations. The Everbilt brand ensures quality and reliability in meeting the needs of various industrial and commercial applications. Perfect for ensuring a water-resistant seal in flooring projects, this seam tape is a valuable addition to any building material and supply collection.