Products / CertainTeed CertaSeam Roof Tape

CertaSeam Roof Tape is a self-adhered roof deck joint tape of rubberized, polymer-modified asphalt under a slip-resistant, cross-laminated HDPE film, used to seal roof deck seams and joints against water intrusion under shingles, slate, tile, shakes or metal; CertainTeed says it meets certain FORTIFIED Roof requirements. The data sheet gives a 4 in. x 75 ft. roll (25 sq. ft.), 40 mils thick, application at 25 degrees F and rising, and a maximum sunlight exposure of three months before it is covered by underlayment.