3M 3015 Vapor Permeable Air Barrier

 A high performance, vapor impermeable, self-adhered membrane possessing good adhesion, elongation and self-sealing properties that make it ideal for use as a secondary barrier behind exterior cladding systems. The membrane material is a proprietary film developed by 3M that is unlike any other existing weather/secondary barrier product. The adhesive contains no asphalt or butyl. Only one membrane material is needed for both the field barrier and for penetration flashing; its unique elastic and adhesive qualities make it an ideal self-adhered flexible flashing material at penetrations as well as for sealing around openings for doors and windows.