Self-adhesive Waterproof Vapor Permeable Membrane For Walls

PRODUCT DESCRIPTION A high-performance composite membrane engineered for walls and roofs that must simultaneously block liquid water and allow vapor diffusion. Manufactured from advanced polymer alloys via a proprietary calendering-lamination process, the sheet delivers reliable hydrophobicity, vapor openness, and wind resistance in a single layer. FIELD OF USE Roofing: specified as the secondary waterproof barrier beneath metal, tile, or concrete roofing assemblies. Wall systems: installed on the cold side of exterior insulation across concrete, masonry, curtain-wall, or timber-steel substrates. PERFORMANCE ADVANTAGES • Water-tight yet vapor-open: rejects wind-driven rain while facilitating outward migration of construction moisture, maintaining dry insulation and substrates. • Thermal durability: polymer formulation resists embrittlement from –40 °C to +90 °C, ensuring long-term service in extreme climates. • Fastener seal integrity: high tear resistance around nail or screw penetrat…