This white single-sided tape combines a heavyduty, weather-resistant polyethylene backing with an aggressive rubber adhesive. VaporBond Tape offers excellent seaming capabilities for our materials with an “Easy Tear” feature to reduce installation time. TVB4 has a WVTR of 0.18 perms per ASTM D 833. Typical applications include vapor retarders, covers and liners. Available in 4” x 210’ roll.