Analysis of Sealing Treatment Methods and Construction Key Points for GRC Panel Connections with Metal Components

The sealing performance of building curtain walls is a core factor affecting building durability and safety, and the treatment of connection joints between GRC panels and metal components is a key aspect of this. As an industry technical expert with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has developed a systematic sealing solution based on practice from over a thousand engineering projects, ensuring structural safety while balancing architectural aesthetics and long-term performance.

Analysis of Sealing Technology Pain Points in GRC Panel and Metal Component Connections

As a lightweight, high-strength new decorative material, GRC (Glass Fiber Reinforced Concrete) is widely used in high-end buildings such as grand theaters and commercial complexes. Its connection joints with metal keels and connectors are subjected long-term to thermal deformation, vibration loads, and rainwater erosion, and traditional sealing methods often develop cracking and leakage problems. Data shows that about 30% of GRC curtain wall repair cases stem from sealing failure. Therefore, joint treatment must address three core requirements: material compatibility, displacement compensation capability, and construction process precision.

Material Selection and Technical Principles of Sealing Treatment

Qinglong's technical team recommends a composite solution of "elastic sealing + rigid support": the primary sealing uses high-modulus silicone weatherproof sealant (movement capability ≥±25%), combined with closed-cell foam rods as backing material to form a compressible elastic buffer layer; metal connector surfaces should undergo hot-dip galvanizing or fluorocarbon spray treatment to enhance corrosion resistance. For coastal high-humidity environments, low-modulus polyurethane sealant can be adopted, whose water vapor permeability is 40% lower than traditional products, making it particularly suitable for overseas projects in Singapore, Malaysia, and other regions.

Standardized Construction Process and Quality Control Points

The construction process must strictly follow the four-step method of "cleaning – priming – sealant application – curing": first, use a specialized cleaner to remove oil from metal surfaces and loose dust from GRC panel joints to ensure clean bonding surfaces; apply two-component epoxy primer for interface treatment to enhance sealant adhesion; maintain a 45° angle with uniform speed during sealant application to ensure full, bubble-free sealant joints; finally, perform 72 hours of constant-temperature curing to avoid premature loading. Qinglong's original "three-level quality inspection system" includes pre-construction material compatibility testing, in-process sealant joint depth inspection (standard depth 8-12mm), and post-completion water tightness spray testing, ensuring that every process step is traceable.

Full Life-Cycle Maintenance Strategy for Sealing Systems

As a national-level high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong has established a comprehensive sealing system maintenance mechanism. It is recommended to conduct a sealant joint integrity inspection every 3 years after project completion, with local repairs for areas showing cracking or debonding; for super high-rise projects (height >100m), drones equipped with infrared thermal imaging technology can be used to accurately locate hidden leakage points. Digital archives established through BIM technology enable full-process data management of the sealing system from design to maintenance.

From the double-curved GRC curtain wall of a landmark project in Guangzhou to the special-shaped component connections of a cultural center in Saudi Arabia, Qinglong has always controlled sealing details with a "meticulous and excellence-pursuing" attitude. As a participating unit in drafting the "Technical Standard for Architectural Application of Glass Fiber Reinforced Cement (GRC)", we firmly believe that a scientific sealing solution is not only an important guarantee of building safety, but also a key technical support for fulfilling our mission of "creating beautiful architecture". Only by choosing a GRC manufacturer with full-chain service capabilities can the long-term reliability of connection joints be ensured at the source.