Sealing Treatment Methods and Application Technology Research for GRC Panel Connections with Metal Components

Sealing Treatment: The Quality Lifeline of GRC Panel-to-Metal Component Connections

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its lightweight high-strength properties and flexible formability, has become the preferred material for high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, the sealing treatment of connections between GRC panels and metal components, a critical factor affecting project quality, is often overlooked yet directly relates to the durability, waterproofing, and safety of buildings. With 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply analyzes solutions to this technical challenge based on over a thousand engineering practices.

Core Technical Points of Sealing for GRC Panel-to-Metal Component Connections

The connection sealing between GRC panels and metal components such as metal keels and embedded parts must balance mechanical stability with waterproofing and impermeability. Through material compatibility research, Qinglong's technical team found that the selection of sealing materials must meet three major requirements: compatibility with GRC substrates and metal surfaces, weather resistance from -40°C to 80°C, and elastic deformation capability of over 15%. In practice, a solution combining silicone structural sealant with polyurethane sealant can effectively meet sealing needs in different environments—the former ensures structural bonding strength, while the latter enhances dynamic displacement compensation capability.

In terms of construction technology, Qinglong has pioneered the "Three-Step Sealing Method": first, sandblasting rust removal and silane coupling agent treatment are applied to metal components to enhance interfacial adhesion; second, foam rods are used to fill gaps and form a backer, controlling the sealant thickness within the golden range of 6-12mm; finally, layered sealant application and secondary curing are implemented to ensure the sealant layer is free of bubbles and sagging. After a provincial cultural center project adopted this process, it withstood 5 years of wind and rain with no leakage or cracking at connection points, with sealing performance 30% better than industry standards.

Sealing System Solutions from a Full-Chain Perspective

As a national high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong incorporates sealing treatment into its full-process quality control system. In the design phase, BIM technology is used to simulate the impact of temperature deformation on sealing joints, optimizing anti-corrosion coatings on metal connectors and sealant width in advance; in the production stage, automated sealant injection equipment ensures sealant mixing ratio precision of ±2%; during on-site installation, 3D laser positioning is used to keep the gap error between GRC panels and metal components within ±1mm, laying a precise foundation for sealing treatment.

For different application scenarios, Qinglong provides customized sealing solutions: exterior wall cladding panels adopt the dual protection of "structural adhesive + drainage channel" to withstand rainwater erosion; interior ceilings focus on fireproof sealing, using fire-resistant sealant that complies with GB 8624-2012 Class A standards. This differentiated solution successfully resolved the sealing challenge between curved GRC curtain walls and aluminum alloy support structures in a commercial complex project in Guangzhou, earning a "zero leakage" acceptance evaluation from the client.

Industry Trends and Qinglong's Technical Advantages

With the in-depth implementation of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), sealing treatment has transformed from hidden work into a core indicator of quality acceptance. As a participating developer of this standard, Qinglong was the first to embed RFID chips into GRC components, achieving full life-cycle traceability of sealing joints. Meanwhile, the company's independently developed nano-modified sealant technology has extended traditional sealing life from 15 years to over 25 years, verified in a landmark project in Vietnam.

From material selection to process innovation, from standard development to project practice, Qinglong has redefined GRC connection sealing technology with 28 years of professional expertise. In the future, with the widespread application of UHPC and GRC composite components, sealing treatment will develop toward "structure-function integration." Qinglong will continue its mission of "Creating Beautiful Architecture," providing designers and owners with full-chain expert solutions from detailed design to after-sales maintenance, driving the continuous upgrading of architectural decoration material technology.