Tunnel Bitumen-Free Self-Adhesive Waterproof Membrane

Underground tunnel engineering teams face costly long-term hidden water leakage troubles caused by weak bonding between waterproof layers and cast-in-place concrete. Our Tunnel Bitumen-Free Self-Adhesive Waterproof Membrane is eco HDPE polymer base layer matched with standard Highway Coating, a core anti-seepage component of full underground Road Protection System, and coordinates with Traffic Sealant to deliver stable long-term Bridge Waterproofing for tunnel portals and underground traffic bridge sections.   This multi-layer composite roll follows GB/T23457-2017 pre-laid waterproof roll standard, completely free of asphalt unlike road & railway bitumen membranes. Unified roll size: 2m width, 20m length, three thickness choices of 1.2mm, 1.5mm, 1.7mm, covering 40㎡ per roll with 2×12cm hot-weld overlap edges. Via pre-laid reverse sticking technology, it forms tight interlocking bond with post-cast concrete to eliminate water channeling risks. It features high tensile strength, sup…