The XFasten Waterproof vapor barrier seam tape is a heavy-duty and all-weather. PROFESSIONAL projects. The XFasten white vapor barrier sheathing tape’s. COMPATIBLE WITH ALL VAPOR BARRIER FILMS. Designed to seal seams of Polypropylene and Polyethylene films, the XFasten Vapor Barrier Seam Tape can stick aggressively to concrete, unfinished walls and wood.
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