The Powerbase Radon Barrier Membrane 400mu is a premium quality, highly durable protective sheeting designed to safeguard your construction projects from harmful radon gases. This 4m x 20m (80m2) barrier ensures enhanced protection against radon, a naturally occurring radioactive gas that can seep through the ground and into buildings. With its robust design, this waterproof and rot-proof membrane provides an effective and long-lasting solution for both commercial and residential buildings. Easy to handle and install, its an excellent choice for health-conscious builders prioritising safety.