How Durable is the Color of GRC Products? Will They Fade?

In the field of architectural decoration, the color durability of materials directly affects a building's aesthetic appeal and service life. For materials like GRC (Glass Fiber Reinforced Concrete), which are widely used in exterior wall cladding panels, landscape architecture, and European-style moldings, fading 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 will provide an in-depth analysis of the color durability performance of GRC products from the dimensions of material properties, process technology, and industry standards, offering a professional reference for project material selection.

The color stability of GRC materials stems from their unique composition and scientific formulation. Compared with ordinary concrete, GRC uses alkali-resistant glass fiber as the reinforcement, combined with special cement, fine aggregates, and additives to form a dense microstructure, fundamentally improving resistance to penetration and weathering. Qinglong GRC employs a composite coloring technology using imported pigments and mineral admixtures in production, allowing pigment particles to penetrate evenly into the material rather than merely adhering to the surface. This "consistent inside and out" coloring method effectively avoids the peeling and fading problems common with traditional coatings. For more industry information: +WeChat qlfsbl123

Key factors affecting the fading of GRC products and Qinglong's solutions. Ultraviolet rays, temperature and humidity variations, and acid-alkali corrosion in the natural environment are the main culprits behind material fading. Qinglong GRC addresses these through three technical measures: first, using weather-resistant pigments verified by accelerated aging tests, ensuring a color deviation of ΔE≤3 in environments from -40℃ to 70℃; second, applying a dedicated nano-silane protective coating on component surfaces to form a transparent protective film that blocks UV rays and pollutant penetration; third, establishing a strict production quality control system, with every batch of products required to pass a 1,000-hour xenon lamp aging test to ensure color retention ≥90%.

Long-term engineering cases bear witness to Qinglong GRC's color durability. In a coastal commercial complex project in South China, Qinglong GRC exterior wall cladding panels withstood 8 years of sea wind erosion and intense UV exposure. Evaluated by a third-party testing agency, the change in color lightness was only 3.2% of the initial value, far below the industry standard of 8%. Another project, a cultural center in the arid region of Northwest China, adopted Qinglong GRC faux sandstone decorative moldings. In an environment with an average annual temperature difference of 50℃ and frequent sandstorms, no obvious fading or color difference appeared during 6 years of use, fully verifying its stability under extreme climates.

Dual guarantees of industry standards and Qinglong's technical advantages. As a participating drafting unit of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong GRC's color durability indicators not only meet national standard requirements but also comply with the internal corporate "Q/QL 003-2023" standard, which is stricter than industry requirements, imposing tighter controls on pigment purity, mixing uniformity, and curing processes. Meanwhile, leveraging the R&D strength of its provincial engineering technology center, Qinglong continuously optimizes its coloring formulas. Its latest "mineral crystal stabilization technology" extends the expected color life of GRC materials to more than 20 years, providing long-lasting aesthetic assurance for high-end buildings. For more industry information: +WeChat qlfsbl123

Key points for evaluating color durability when selecting GRC products. It is recommended to examine three aspects: first, review the weather resistance test reports provided by the manufacturer, focusing on color change data after UV aging and freeze-thaw cycles; second, learn about the actual service life and current condition of project cases, avoiding reliance solely on laboratory data; third, confirm whether the manufacturer has full-chain service capabilities, such as the integrated services offered by Qinglong covering detailed design, custom production, and after-sales maintenance, which can control material quality and color stability at the source. For projects pursuing architectural aesthetics and long-term value, choosing a GRC manufacturer like Qinglong with mature technology and rich experience is the key to avoiding fading problems and achieving a building that "remains beautiful over time".