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

In the field of architectural decoration, a material's color durability directly affects a project's long-term aesthetic performance and maintenance costs. GRC (Glass Fiber Reinforced Concrete), a key material widely used for exterior wall cladding panels, landscape features, and European-style decorative moldings, has long faced fading issues—a core concern for designers and developers. Qinglong Group, with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, provides an in-depth analysis of the color durability of GRC products, covering material fundamentals, process technology, and real-world cases.

The color stability of GRC material essentially depends on raw material selection and coloring techniques. High-quality GRC uses high-purity white cement, alkali-resistant glass fiber, and imported mineral pigments, achieving color lock-in through dual technologies: through-body coloring or surface coating. Qinglong insists on a pigment content of no less than 3% in production and, after 800 hours of accelerated aging tests (equivalent to 15 years in a natural environment), ensures the color fading rate is controlled within 5%, far better than the industry average of 10%. Compared with the surface spray-coating process of ordinary cement products, Qinglong's through-body coloring technology for GRC fundamentally eliminates the risk of surface fading and peeling, maintaining a fresh appearance even in coastal areas with strong ultraviolet radiation and high humidity. For more industry information: +WeChat qlfsbl123

Three key factors affecting GRC fading and their solutions deserve attention. First is ultraviolet exposure: long-term exposure causes organic pigments to decompose, so Qinglong uses mineral pigments from Germany's Bayer, whose inorganic composition offers extremely strong light stability. Second is moisture erosion: Qinglong optimizes the mix ratio to keep the water absorption of GRC products at ≤8% and applies a silane impregnation agent on the surface to form a waterproof layer. Third is temperature variation: during the detailed design stage, Qinglong simulates extreme temperature cycles from -30℃ to 70℃ to ensure the material's expansion coefficient matches the substrate, avoiding uneven color caused by cracking. These technical details demonstrate Qinglong's strength as a national-level high-tech enterprise and a drafting unit of the Technical Standard for Application of GRC in Architecture.

Actual engineering cases are the best proof of GRC color durability. In a coastal commercial complex project undertaken by Qinglong, custom light-gray GRC curtain wall panels withstood 6 years of sea wind and salt spray erosion, with a third-party tested color difference of only 1.2 (barely perceptible to the naked eye). In another landmark project, red GRC reliefs achieved a natural transition from deep red to light red through Qinglong's proprietary "Color Gradient Control Technology," retaining the visual layering as originally designed even after 5 years. These cases confirm the reliable performance of Qinglong GRC in municipal buildings and high-end real estate, making Qinglong a strategic partner of renowned developers such as Poly and Vanke.

When choosing GRC products, how do you judge their color durability? It is recommended to start from 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, examine the production process—through-body coloring is superior to surface spray coating, and mineral pigments are superior to organic pigments; third, refer to long-term tracking records of past projects—Qinglong can provide color stability case studies from projects spanning more than 10 years. As an industry leader dedicated to UHPC/GRC/GRG/GRP development, Qinglong has always upheld the mission of "Creating Beautiful Architecture," making every GRC product an artwork that stands the test of time through technological innovation and rigorous quality control. For more industry information: +WeChat qlfsbl123