The Necoflex Radon Barrier Black RMB350 25m x 4m is a high-quality loose-laid radon-resisting membrane manufactured from a blend of virgin low-density polyethylene (LDPE). This reinforced multi-layer membrane offers high tensile and tear strength, providing a robust barrier against both radon gas and moisture vapour. It is fully compatible with the Necoflex RAM system, ensuring professional-grade protection for residential and commercial buildings.