How Does the Manufacturer Ensure the Waterproof Performance of GRC Products?

In the field of architectural decoration, GRC (Glass Fiber Reinforced Concrete) is widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings thanks to its lightweight, high-strength, and flexible shaping properties. However, waterproofing performance, as a key indicator for the long-term stable application of GRC products, has always been a core concern for designers, owners, and developers. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group (hereinafter referred to as Qinglong) has built a full-process waterproofing assurance system covering everything from material formulation to construction and maintenance through technological innovation and standardized management, providing reliable waterproofing solutions for projects.

### 1. Material Formulation: Building the GRC Waterproofing Foundation at the Source
The waterproofing performance of Qinglong GRC products first stems from scientific material formulation design. In the compounding of glass fiber and the cement matrix, Qinglong uses high alkali-resistant glass fiber (content ≥5%) and low-alkalinity sulfoaluminate cement, and by optimizing aggregate gradation (particle size controlled at 0-5mm) and incorporating composite waterproofing additives (such as silica fume and nano-scale waterproofing agents), it significantly reduces material porosity and improves compactness. Testing shows that the water absorption of Qinglong standard GRC boards is ≤8%, far below the industry average (12%-15%), fundamentally reducing water penetration paths. In addition, for projects in high-humidity environments (such as underground utility tunnels and areas around swimming pools), Qinglong can custom-add penetrating crystalline waterproofing components to form a self-healing waterproof barrier. For more industry information: +WeChat qlfsbl123

### 2. Production Process: Precision Manufacturing Ensures Structural Waterproofing
In the production stage, Qinglong introduces automated compression molding technology (pressure ≥5MPa) and a steam curing process (temperature 80-90℃, curing time ≥12 hours) to ensure that GRC components have a dense internal structure free of honeycombing and surface pits. For irregularly shaped components (such as double-curved exterior wall panels and openwork reliefs), 3D scanning and parametric design (Rhino+Grasshopper platform) are used to achieve precise mold matching, avoiding water leakage risks caused by molding defects. Meanwhile, Qinglong has established strict factory inspection standards: each batch of products must pass a 24-hour immersion test (penetration depth ≤3mm) and freeze-thaw cycle testing (50 cycles without cracks) to ensure waterproofing performance meets standards.

### 3. Surface Treatment: Multi-Layer Protection Enhances Impermeability
The surface treatment processes of Qinglong GRC products further strengthen the waterproofing effect. Conventional projects use a dual-layer protection system of dedicated GRC waterproofing primer (adhesion ≥1.5MPa) + fluorocarbon topcoat (weather resistance ≥15 years), forming a continuous hydrophobic film with a water contact angle of over 105°. For special effect requirements such as antique stone and metallic finishes, after sandblasting, acid etching and other processes, silane impregnation agent (penetration depth ≥2mm) is additionally applied to improve surface impermeability and stain resistance. In the Dongguan Women and Children's Activity Center project, the GRC exterior wall panels treated with this process have withstood 6 years of wind and rain while remaining free of leakage and efflorescence. For more industry information: +WeChat qlfsbl123

### 4. Installation and Maintenance: Full-Process Control Eliminates Leakage Risks
Waterproofing assurance depends not only on the product itself but also on professional installation and maintenance. Qinglong adopts a "dry-wet separation" installation method during construction: a 5-10mm air layer is reserved between the components and the substrate, filled with elastic waterproof sealant (weather resistance ≥20 years), and a drainage slope (≥2%) is set; anchor nodes use stainless steel connectors (316 material) combined with waterproof gaskets and sealant to prevent seam leakage caused by metal corrosion. In addition, Qinglong provides after-sales maintenance service for up to 10 years, with regular (once a year) inspection and repair of GRC surface coatings and sealant to ensure long-term stable waterproofing performance.

As a national high-tech enterprise and a participant in formulating GRC industry standards, Qinglong has always upheld the mission of "creating beautiful architecture," making waterproofing performance one of the core competitive strengths of its GRC products. From material R&D to project delivery, through full-chain technical control, Qinglong has provided reliable GRC waterproofing solutions for thousands of projects across the country (such as the translucent concrete project at Century Plaza on Nanjing East Road and a commercial complex in Malaysia). Looking ahead, Qinglong will continue to deepen its expertise in the UHPC/GRC/GRG/GRP materials field, drive the upgrading of industry waterproofing standards through technological innovation, and safeguard building safety and aesthetics.