Core Viewpoint - The introduction of the "Non-Open Flame Rapid Construction Technology" and the core product "Waterproof Star" by Beijing Construction Municipal Road and Bridge Municipal Engineering Research Institute addresses the challenges of roof waterproofing in urban renewal and old building renovation, providing a safe and efficient solution [1]. Group 1: Technology and Product Features - The "Non-Open Flame" technology eliminates fire hazards associated with traditional roofing methods, which often rely on open flames and can pose significant risks, especially for older wooden structures [1]. - "Waterproof Star" has a bonding strength that is twice that of traditional materials, allowing it to adhere firmly to various substrates, including concrete, brick, and metal, even in damp conditions [1][2]. - The elongation rate of "Waterproof Star" exceeds traditional materials by 30%, ensuring it can adapt to building movements without cracking, thus maintaining waterproof integrity [2]. Group 2: Performance and Benefits - The application of "Waterproof Star" has resulted in a nearly 50% reduction in construction time and significant cost savings, as demonstrated in the Longbaochen Building project [1]. - The product exhibits superior weather resistance, with a 50% improvement over traditional materials, and maintains high performance across a wide temperature range, with 27% better high-temperature resistance and 20% better low-temperature resistance [2]. - The waterproof lifespan of roofs using "Waterproof Star" is extended by 30% compared to traditional materials, significantly reducing maintenance frequency and enhancing building longevity [3].