AirOutshield™ Wall is a breathable underlayment for Rain Screen Wall Systems. Used as a Weather Resistive Barrier (WRB) behind rainscreen wall cladding systems including siding (vinyl, wood, fibre cement, metal and brick). AirOutshield™ Wall high rate of breathability, 156.1 Perms and 182 perms after UV and Heat Aged, allows moisture within the wall system to dry rapidly..Thereby, reducing potential for mold, mildew, rot, metal corrosion and reduced insulation thermal values. AirOutshield™ Wall is tear, rip, and puncture resistant which reduces repairs, labor costs. "Dries In" Buidling by being left exposed up to 4 months allowing construction to proceed efficiently.