Is the Product Quality of GRC Manufacturers Guaranteed? The Key Lies in These Four Core Guarantee Systems

The product quality of GRC manufacturers is by no means "one-size-fits-all." Reliable manufacturers achieve consistent quality through comprehensive assurance systems, while small manufacturers, lacking technology, equipment, and management, are prone to problems such as insufficient strength, cracking, and poor durability. As a National High-Tech Enterprise, Qinglong has established four core assurance systems—"formula & process + quality control + testing & verification + after-sales commitment"—making product quality traceable, verifiable, and guaranteed.

Assurance System 1: Scientific formula and advanced process to control quality at the source. The core of product quality lies in the formula and process. Reliable manufacturers optimize formulas through R&D and adopt standardized processes to avoid human error. Qinglong's GRC formula has been iterated over 28 years, using low-alkali cement, alkali-resistant glass fiber (volume ratio ≥1.5%), and continuously graded quartz sand, with composite mineral admixtures and high-efficiency water reducers added, ensuring flexural strength ≥20MPa and drying shrinkage ≤0.08%. Production adopts a high-pressure spray molding process (pressure 0.3–0.5MPa) and intelligent constant-temperature curing kilns (curing at 90–95℃ for 12–16 hours), while automated production lines reduce manual intervention, with component compactness ≥95%, avoiding quality risks such as voids and cracks at the source. Compared with some small manufacturers that use manual mixing and natural curing, Qinglong's formula and process improve product quality consistency by more than 40%.

Assurance System 2: Full-process quality control with standards at every step. Reliable manufacturers establish a three-level quality control system covering "raw materials–production–finished products," rather than testing only at the finished-product stage. Qinglong's quality control runs through the entire process: incoming raw materials must be accompanied by certificates of conformity, with sampling inspection for every batch (e.g., the alkali resistance of alkali-resistant glass fiber and the strength grade of cement); during production, mix flowability and fiber dispersion are sampled every 2 hours, and mold accuracy is calibrated for each batch (error ≤±0.5mm); before leaving the factory, finished products undergo 100% inspection of appearance (no cracks, chipped edges, or corners), dimensional deviation (≤±2mm), and mechanical properties (flexural strength and impact strength); non-conforming products are all reworked, with a factory pass rate of 100%.

Assurance System 3: Third-party testing and authoritative certification, with quality backed by data. Product quality cannot rely solely on the manufacturer's own claims; it must be substantiated by third-party test reports and authoritative certifications. Every batch of Qinglong's GRC products is sent to CMA-certified third-party institutions for testing. Test items include flexural strength, freeze-thaw cycle resistance, impermeability grade, and environmental indicators. All test data comply with the standard "Glass Fiber Reinforced Cement (GRC) Decorative Products" (JC/T940-2022), with some indicators even exceeding the standard requirements. In addition, Qinglong has passed ISO9001 quality management system certification and High-Tech Enterprise certification, and its product quality is recognized by authoritative institutions. Compared with some manufacturers that only provide internal test reports, Qinglong's third-party test reports carry greater credibility.

Assurance System 4: After-sales commitment and warranty services, with quality assured over the long term. Product quality assurance lies not only in passing inspection at the factory but also in long-term stability during use, so reliable manufacturers provide clear after-sales commitments and warranty services. Qinglong commits to a design service life of ≥50 years for its GRC products and a warranty period of ≥10 years. During the warranty period, maintenance services such as regular inspections and crack repairs are provided free of charge, and after the warranty period, technical support and repair services are provided for life. A product quality traceability system has been established, allowing every batch of products to be traced by number through full-process information including raw materials, production, and testing. In the Third-Front Construction project in Panzhihua, Sichuan, Qinglong's GRC curtain wall panels were promised 20 years without strength degradation or cracking, and they remain in good condition to this day.

Whether the product quality of a GRC manufacturer is guaranteed depends on whether it has the four systems of "scientific formula & process, full-process quality control, third-party testing, and after-sales warranty." With its comprehensive quality assurance systems, Qinglong delivers stable and reliable product quality and has won recognition from thousands of major projects. For owners and designers, choosing a manufacturer with a complete quality assurance system is key to avoiding later quality risks and reducing maintenance costs.