SOPRASEAL Stick VP is a self-adhered vapor-permeable air barrier membrane used in wall construction. SOPRASEAL Stick VP is composed of a tri-laminate polypropylene composite facer coated with a high tack self-adhesive backing protected by a silicone release film. The self-adhesive properties of SOPRASEAL Stick VP are unmatched in the industry, and the roll size combined with high tack adhesive make it very easy to install.