Kimberly-Clark BLOCK-IT® House Wrap prevents water penetration while providing a breathable barrier technology that allows vapor to escape, helping protect your structure for years to come. The unique channeling feature directs liquid away from the wall assembly and to the ground, keeping your structure dry. Not only does Kimberly-Clark BLOCK-IT® House Wrap provide superior weatherization at standard pricing you can trust, it's also quick and easy to install thanks to the patented, cloth-like, nonwoven material that resists tears, abrasions.