Lamtec's WMP-RETRO Polypropylene Vapor Retarder is ideal for use in metal buildings, warehouses, and other structures where upgraded vapor control is needed without full insulation replacement. The reinforced structure resists wrinkling and sagging during installation, maintaining a professional finish even in overhead or vertical applications. With Class A fire performance and compliance with ASTM C1136 Types II, IV, and VI, this facing meets rigorous standards for safety and durability.