【How-to】Is tyvek tape waterproof - Howto.org

Typar^® Building Wraps has a lower perm rating compared to Tyvek^® HomeWrap^®; so, a wall covered with Typar® can take longer to dry, which increases the risk of mold, mildew, and rot. Tyvek^® HomeWrap^® has a drainage plane so can manage bulk water better than Typar^® Building Wrap, that does not have a drainage plane.