Product Announcement from Polyguard Products, Inc.
ZeroPerm is a 3-ply composite membrane consisting of a white 1.5 mil polymer film, 1.0 mil aluminum foil, and one 0.5 mil clear polymer film. The foil provides the zero permeance in the composite while the polypropylene/polyester layers protect the foil and provide the white finish, toughness and tear resistance. ZeroPerm is reversible, the white polypropylene side of can be left exposed when no protective jacket is required and offers an appearance similar to traditional and next generation ASJ, PVC and PVDC polymer jacketing. The polyester side presents a smooth silver foil finish.
· Bright white finish similar to traditional ASJ, ASJ+ and PVDC jacketing
· Meets ASTM E84 25/50 Smoke and Flame requirements.
· Puncture and tear resistant
· Zero permeability
· Mold resistant
ZeroPerm® vapor barrier is used on cold systems either between layers of insulation on sub-freezing projects like LNG piping, or as the outer vapor-barrier jacket on ammonia, brine or glycol systems under mechanical jacketing, either metal or PVC. ZeroPerm can also be used on chilled water systems replacing ASJ and PVDC jacketing either left exposed or under a protective metal or PVC jacket.
ZeroPerm is typically factory installed by a fabricator but can be installed in the field. Two types of ZeroPerm tapes are available to complete the installation in the field. Both use a high quality, acrylic adhesive with excellent cold weather performance. ZeroPerm A has a kraft release liner and is typically available in 2" and 3" width rolls for sealing longitudinal and circumferential laps. Zero-Perm Self-Wound has no liner, is used on valves and fittings and comes in 1", 2" and 3" widths. See separate data sheet for Zero-Perm tapes.