... , or 15mil,20mil 3. tape core can be 40mm, or 75mm Polyken tape 955-25 for oil pipelinePolyken tape 955-25 is a ... , water pipeline polyethylene,underground overheadExcellent adhesion to inner-layer tape and self Resistant to UVProvides long-term corrosion protection to ... Outlining seams on spiral and seam welded pipe.Primerless mastic tape readily conformable to odd-shaped pipe fittings, valves, flanges ...