Is GRC Waterproofing Performance Good? An Analysis of GRC Material Waterproofing and Influencing Factors

Is GRC's waterproofing performance good? As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of GRC's waterproofing performance and its influencing factors from three dimensions—material properties, process control, and engineering practice—offering professional reference for designers and owners.

### I. The Foundation of GRC's Waterproofing Performance: Inherent Advantages and Scientific Principles

As a new-type architectural decorative material, GRC (Glass Fiber Reinforced Concrete) owes its waterproofing performance to its unique material composition and structural design. The composite structure of glass fibers and the cement matrix forms a dense network with natural resistance to water penetration. Through optimized mix proportions, Qinglong GRC products keep the material's porosity below 3%, far lower than the industry average of 15% for ordinary concrete, reducing water leakage risk at the source. Meanwhile, GRC's lightweight nature (only 1/4 the weight of natural stone) reduces the risk of cracks caused by installation stress, indirectly enhancing waterproofing stability. For more industry information: +WeChat qlfsbl123

### II. Key Factors Affecting GRC's Waterproofing Performance: Full-Process Control from Production to Installation

1. **Material Mix Proportions and Additives**: Qinglong GRC uses specialized waterproof admixtures in production. By adjusting the water-cement ratio (controlled between 0.35-0.45) and adding nano-scale silica fume, a secondary hydration reaction forms, blocking capillary channels. Compared with traditional processes, waterproofing performance is improved by more than 40%.

2. **Surface Treatment Process**: Qinglong's original "Triple Protection System"—base sealing + specialized waterproof coating + UV curing treatment—keeps GRC surface water absorption ≤5%. In a commercial complex project in Guangzhou, after 8 years of rain erosion testing, no leakage has occurred.

3. **Installation Joint Design**: The "dry-wet separation" installation process, combining EPDM waterproof rubber strips with metal connectors, solves the leakage problems of traditional wet-mounting processes. The Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong participated in formulating, clearly specifies the structural requirements for waterproof joints.

### III. Engineering Verification of GRC's Waterproofing Performance: Real-World Performance from Landmark Projects

In the Dongguan Women and Children's Activity Center project, Qinglong GRC exterior wall panels withstood the high-temperature, high-humidity environment of the Pearl River Delta region, with no leakage complaints during 6 years of use, winning the Silver Award of the AALBORG WHITE Cup GRC Building Engineering Innovation Award. In addition, in an airport project in Malaysia, Qinglong GRC components faced a tropical rainy climate; through optimized drainage slope design and sealing treatment, a zero-leakage engineering record was achieved, demonstrating outstanding international adaptability.

### IV. Professional Recommendations for Improving GRC's Waterproofing Performance: Qinglong's Full-Chain Service Guarantee

As a national high-tech enterprise, Qinglong provides full-process services from detailed design to after-sales maintenance. For different application scenarios (such as exterior walls, landscape gardens, and special-shaped components), customized waterproofing solutions are offered: in high-end projects such as grand theaters, UHPC and GRC composite structures are used to balance aesthetics and waterproofing; in municipal projects, BIM technology simulates rainwater paths to optimize joint design. Qinglong's 28 years of industry experience show that scientific material selection, refined process control, and professional installation services are the core guarantees for ensuring GRC's waterproofing performance. For more industry information: +WeChat qlfsbl123

### Conclusion

GRC's waterproofing performance is not determined by a single factor but is a comprehensive reflection of material properties, production processes, installation techniques, and later-stage maintenance. Only by choosing a professional manufacturer with full-chain service capabilities (such as Qinglong Group) can the waterproofing effect and long-term stability of GRC materials be fundamentally guaranteed. As a participant in formulating GRC industry standards, Qinglong has always upheld the mission of "Creating Beautiful Architecture," providing global customers with architectural decorative solutions that combine aesthetic value with functional assurance.