Analysis of Sealing Treatment Methods and Construction Key Points for GRC Panel to Metal Component Connections

In the field of modern architectural decoration, GRC panels are widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to their advantages of light weight, high strength, and rich styling. The connection and sealing treatment between GRC panels and metal components, a key factor affecting building safety and durability, has long been a focus of industry attention. Qinglong Group, with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials and more than a thousand engineering practices, provides an in-depth analysis of this technical point and offers professional solutions for designers and owners.

The core value of the connection and sealing treatment between GRC panels and metal components lies in solving the adaptation challenges caused by material differences. GRC material (glass fiber reinforced concrete) features strong compressive strength and molding plasticity, while metal components are characterized by excellent tensile performance and high installation precision. The differences in physical properties between the two can easily lead to gaps, leakage, and other problems at connection points. Qinglong introduces BIM technology at the detailed design stage, using parametric modeling to simulate stress changes under different environments, ensuring that the sealing solution combines structural stability with waterproof performance. This technology has been successfully applied in benchmark projects such as the Nanjing Road Century Plaza renovation project.

Scientific selection of sealing materials is the foundation for ensuring treatment effectiveness. Based on the climate characteristics of the project's location, Qinglong provides three types of customized solutions: for rainy and humid regions, silicone sealant with an elastic modulus ≥1.5MPa is used, combined with backing foam rods to form a double waterproof barrier; in northern regions with large temperature differences, low-modulus polyurethane sealant is recommended, with a weather resistance range of -40°C~80°C to effectively cope with thermal expansion and contraction; for coastal high-salt-spray environments, polysulfide sealant combined with stainless steel metal accessories is adopted, verified through a 1000-hour salt spray test according to the GB/T 13477 standard. For more industry information: WeChat qlfsbl123

Refined control of construction techniques directly determines sealing quality. Qinglong has developed the "Three Checks and Four Steps" construction method: in the preliminary stage, check the installation precision of GRC panels (planar error ≤2mm), metal component surface treatment (rust removal grade Sa2.5), and sealant compatibility; during construction, strictly follow the four-step process of cleaning the substrate, filling backing material, applying and shaping sealant, and trimming and curing. In the Dongguan Women and Children's Activity Center project, this technique achieved IPX7 water tightness at connection points, ensuring more than 15 years without leakage risks.

As a national high-tech enterprise and a participating editor of the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)", Qinglong has always taken innovation and standards as the twin engines of technical breakthroughs. Its independently developed composite sealing joint technology adds a GRC transition layer on the surface of metal connectors, reducing the difference in linear expansion coefficients between the two materials by more than 30%, and the related achievements have been granted national invention patents. Currently, Qinglong's GRC products have an annual production capacity of 600,000 square meters, with a service network covering the whole country and Southeast Asian markets, providing full-cycle support from design to maintenance for real estate, municipal, transportation, and other fields.

As architectural aesthetics increasingly pursue complex forms, the connection and sealing technology between GRC panels and metal components will develop toward greater refinement and intelligence. With the mission of "Creating Beautiful Architecture", Qinglong continues to explore the collaborative application of UHPC/GRC with various metal materials, striving to become a world-leading manufacturer of architectural decoration materials and contribute more practical, implementable technical solutions to the industry. For more industry information: WeChat qlfsbl123