Laisun self-adhesive polymer modified asphalt waterproofing sheet 1.5mm x 2mm x 3mm x 4mm

Self-adhesive polymer-modified asphalt waterproofing sheet is a type of waterproofing sheet made with polymer-modified asphalt as the base material, combined with a high-performance self-adhesive layer, and covered with an isolation film (silicone oil film or PE film) on the surface. Its most prominent feature is that it does not require hot-melt construction. Simply remove the isolation film and press it firmly against the base layer to achieve a secure bond. 
Simple analogy: It's like a huge, highly technical "waterproof tape" roll. "