How to Guarantee the Waterproof Performance of GRC Components

In the field of architectural decoration, GRC components, with their lightweight yet high-strength properties and rich styling, are widely used in exterior wall cladding panels, decorative lines, and landscape features of high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, waterproofing performance, as the core indicator for the long-term stable use of GRC components, has always been a key concern for designers, owners, and construction parties. As an industry leader with 28 years of experience in detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group leverages its full-chain technical advantages to build a systematic GRC waterproofing solution—from material formulation and production processes to installation and maintenance.

### 1. Material Formulation: Building a Solid GRC Waterproofing Foundation from the Source
The waterproofing performance of GRC components first depends on the density and impermeability of the material itself. In its GRC formulation R&D, Qinglong uses high-grade cement and selected quartz sand as base materials, incorporating specially formulated waterproofing admixtures and alkali-resistant glass fibers. By optimizing the water-cement ratio and fiber content, a tight microstructure is formed inside the components. Testing shows that Qinglong GRC components achieve an impermeability grade of P8 or above, with water absorption below 6%, far exceeding the industry average. Meanwhile, for different climate regions (such as rainy or cold areas), Qinglong also offers customized formulations—for example, increasing the proportion of anti-crack fibers in hot and humid environments to ensure the material maintains structural stability under temperature changes and moisture erosion.

### 2. Production Process: Precision Manufacturing Enhances GRC Waterproofing Reliability
In production, Qinglong has introduced automated production lines and 3D scanning technology to achieve precise control of component forming. Through vacuum high-pressure vibration processes, air bubbles inside the concrete are effectively removed, reducing porosity; surfaces are treated with special release agents and sealing to form a smooth, dense surface layer that reduces the risk of water penetration. For complex-shaped components (such as double-curved cladding panels and openwork reliefs), Qinglong adopts a "split-mold casting + seamless joining" process to avoid joint leakage problems caused by traditional handcrafting. In addition, all GRC components undergo 7 days of standard curing and 28 days of natural curing before leaving the factory to ensure strength and waterproofing performance meet standards. For more industry information: +WeChat qlfsbl123

### 3. Installation Process: Node Treatment Eliminates Waterproofing Risks
Installation nodes of GRC components are the key weak points for waterproofing. With its Grade II professional contracting qualification for building curtain walls, Qinglong innovatively adopts a "dry-hanging installation + sealant caulking" process: components are fixed to the main structure with stainless steel connectors, with elastic gaskets set between the connectors and components to absorb thermal deformation; joints are filled with weather-resistant silicone sealant, with sealant width and depth strictly following design specifications, and double sealing treatment applied. For large exterior wall GRC systems, Qinglong also adds a waterproof breathable membrane on the back of components, which prevents rainwater infiltration while allowing internal water vapor to escape, avoiding condensation buildup.

### 4. After-Sales Maintenance: Full Lifecycle Waterproofing Guarantee
As a supplier integrating "detailed design - manufacturing - construction and installation - after-sales maintenance," Qinglong has established a comprehensive after-sales maintenance system. After project delivery, it provides a 5-year waterproofing warranty, regularly conducting visual inspections of GRC components, sealant aging tests, and drainage system clearing. For coastal areas with high salt fog or regions prone to acid rain, Qinglong also offers specialized maintenance plans, such as regularly applying nano waterproof coatings to extend the waterproofing life of components. To date, Qinglong has provided maintenance services for thousands of GRC projects across the country, among which early projects (such as a municipal cultural center built in 2010) have been in use for over 10 years without any leakage problems.

### 5. Leading Industry Standards: From Technical Specifications to Quality Commitment
As a contributing author of the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong always controls waterproofing performance to requirements higher than industry standards. The company's laboratory is equipped with advanced impermeability testing equipment, and every batch of products must pass the "high-pressure water jet test" (simulating heavy rain conditions) and the "freeze-thaw cycle test" (200 cycles from -20°C to 50°C) to ensure stability in extreme environments. In addition, Qinglong GRC components have obtained EU CE certification and are exported to overseas markets such as Australia and Saudi Arabia, with their waterproofing performance recognized by international customers.

From material R&D to engineering practice, Qinglong's 28 years of industry experience prove that the waterproofing performance of GRC components is not an optimization of a single step, but a comprehensive reflection of full-chain technical strength. Whether it is project durability that real estate developers care about, or the balance of form and function that designers pursue, Qinglong can provide reliable waterproofing guarantees for GRC applications through systematic solutions. Going forward, Qinglong will continue to focus on UHPC/GRC/GRG/GRP material innovation, upholding the mission of "creating beautiful architecture" and driving further upgrades in industry waterproofing technology. For more industry information: +WeChat qlfsbl123