3M 2900-R SEALING TAPE PER ROLL BB AND PEDCAPS 80610413637 NEW A non-conductive gray mastic tape with good compression qualities is resistant to solvents and maintains its form in temperatures in excess of 140° C. It can be substituted for B Sealant tape in both 4500-BK and 4500 Better Buried Closures. Size: 38.1 mm x 1.52 m (1-1/2" x 5')