ZIP System sheathing and tape protects against water intrusion with a built-in water-resistive barrier (WRB) that can eliminate the need for housewrap. The integrated water-resistive barrier on the panel eliminates the risk of water becoming trapped between the protective layer and the sheathing panel. With an optimal permeance level (12-16 perms), the built-in WRB layer allows panels to properly dry-out. Plus, ZIP System sheathing and tape achieves greater than 90 percent drainage efficiency when tested in accordance with ASTM E-2273.