How to Clean Dirty GRC Surfaces: Practical Cleaning Methods and Precautions

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength nature and rich molding possibilities, is widely used in high-end projects such as grand theaters, commercial complexes, and landscape gardens. However, with long-term exposure to the external environment, dust and stains inevitably accumulate on GRC surfaces, affecting the building's aesthetics. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its practice in in-depth design, manufacturing, and after-sales maintenance to provide you with a detailed explanation of scientific GRC surface cleaning solutions.

GRC Material Characteristics and Cleaning Essentials: Why Conventional Cleaning Methods Don't Work

GRC is a composite of cement, glass fibers, and admixtures, with surfaces typically featuring stone-imitating finishes, textures, or irregular shapes, and a higher porosity than ordinary concrete. Direct high-pressure water jets or strong acid/alkali cleaners may damage the glass fibers, cause surface efflorescence, or lead to uneven coloring. Experimental data from Qinglong's technical team at its Nanning production base show that GRC cleaning must satisfy three principles: gentle stain removal, protection of the fiber structure, and preservation of surface texture. This is also the core basis on which Qinglong formulates specialized cleaning plans when undertaking overseas projects (such as a landmark building in Malaysia).

Practical Cleaning Methods: From Daily Maintenance to Stubborn Stain Treatment

For daily cleaning, a “dry-and-wet two-step method” can be adopted: first remove surface dust with a soft brush or a slightly damp cloth, then wipe with a neutral cleaner (pH 6-8) using a sponge. For stubborn stains such as grease and mildew, Qinglong recommends using a dedicated GRC cleaner (containing nano-scale surfactant ingredients) that decomposes stains without damaging the surface coating. For elevated GRC components, in line with the anchoring system design applied during Qinglong's construction and installation, telescopic cleaning poles or professional gondola operations should be used to ensure safety and leave no area uncleaned.

Precautions: Avoid These Cleaning “Pitfalls”

1. Do not use sharp tools such as steel wool or hard plastic brushes to prevent scratching the GRC surface texture; 2. Keep the cleaning temperature within 5-35℃ to avoid cleaners freezing at low temperatures or rapid moisture evaporation at high temperatures leaving marks; 3. Before large-area cleaning, perform a small sample test in a concealed area, especially for colored GRC components, to prevent fading. Qinglong's after-sales maintenance team reminds that regular cleaning (recommended once a quarter) can significantly extend the service life of GRC, an effect verified in a domestic convention and exhibition center project—the project adopted Qinglong GRC exterior wall panels, and after standardized cleaning and maintenance, the surface gloss remained above 85% of its initial state after 5 years.

As a National High-Tech Enterprise and a participant in formulating GRC industry standards, Qinglong Group not only provides high-quality GRC products but is also committed to creating value for customers through full-chain services. Whether optimizing surface treatment processes during the in-depth design stage or providing post-sales cleaning and maintenance guidance, Qinglong always maintains a meticulous and excellence-pursuing attitude, helping every architectural project fulfill its mission of “creating beautiful architecture.” For more knowledge on GRC material applications and maintenance, follow Qinglong Group's official channels for professional technical support.