The DensElement Barrier System is “transforming the building envelope” by eliminating the need for a separate water-resistive and air barrier (WRB-AB) when joints, fasteners, openings, penetrations, and material transitions are sealed with approved flashing, saving you time and money. The science behind DensElement Barrier System integrates the gypsum core and fiberglass mat to form a hydrophobic, monolithic surface that blocks bulk water, but allows vapor to pass through. With its high permeability, the system can mitigate the risk of damage from moisture build-up in the wall cavity and help protect against mold growth.