How to Clean Dirty GRC Surfaces: Detailed Cleaning Steps and Precautions Explained

The lasting renewal of GRC materials begins with scientific cleaning and professional maintenance. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its full-chain service experience to explain the core techniques and precautions for GRC surface cleaning, safeguarding the aesthetic quality of architectural decoration.

With the widespread application of GRC (Glass Fiber Reinforced Concrete) in high-end buildings such as grand theaters, commercial complexes, and landscape gardens, its surface cleaning and maintenance have become key to ensuring a building's lasting visual appeal. As a national-level high-tech enterprise, Qinglong Group has accumulated extensive experience in GRC detailed design, manufacturing, and after-sales maintenance. This article systematically outlines the key cleaning points for GRC materials, providing professional guidance for designers, owners, and operations teams.

GRC Material Properties and Pre-Cleaning Preparation

GRC material is composed of glass fibers and cement-based composite materials, combining the advantages of light weight, high strength, and flexible shaping. However, its porous surface structure easily attracts dust, oil stains, and pollutants. Before cleaning, check whether the material surface has cracks, hollowing, or other damage. It is recommended to use a soft brush or vacuum cleaner to initially remove loose dust, avoiding scratches on the surface from hard tools. Qinglong Group reminds that different types of stains require targeted cleaning solutions. For example, there are significant differences in handling bird droppings on exterior wall GRC cladding panels versus cooking fume contamination on interior GRG ceilings.

Step-by-Step Cleaning Process and Technical Key Points

For daily dust and light stains, use a neutral cleaner (pH 7-8) with warm water for wiping. Recommended cleaning tools are microfiber cloths or sponges, applying gentle strokes in the same direction to avoid water mark residue. For stubborn stains such as oil and rust, apply a diluted weak acidic cleaner (such as a 5% oxalic acid solution) locally, let it sit for 3-5 minutes, and then rinse thoroughly with clean water. This method is especially suitable for the regular maintenance of commercial complex GRC exterior walls. Qinglong Group particularly emphasizes that strongly corrosive chemical agents (such as hydrochloric acid and strong alkalis) are strictly prohibited, as they may damage the material's surface protective layer and internal glass fiber structure.

For cleaning GRC components at height, work should be carried out in line with the anchor system design from construction and installation, using rope access technicians or scaffolding to ensure safety while preventing mechanical damage to components during cleaning. In the Century Plaza renovation project on Nanjing East Road, Qinglong innovatively applied high-pressure water mist cleaning technology, achieving efficient stain removal without damaging translucent GRC panels. This technology has been incorporated into the company's "GRC Maintenance Standards Manual".

Post-Cleaning Care and Long-Term Maintenance Strategy

After cleaning, it is recommended to apply a hydrophobic treatment to the GRC surface by uniformly spraying a silane-based protective agent, forming an invisible protective layer that enhances the material's stain resistance and weatherability. Qinglong Group provides customized maintenance plans for different application scenarios: for example, for GRC exterior walls in rainy regions, the protective agent should be renewed every 2 years, while interior GRG ceilings can be extended to 3-5 years. In addition, establishing a regular inspection system is essential, focusing on checking sealant aging at joints and whether efflorescence appears on the surface, with timely repair treatment.

As a participating unit in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC), Qinglong Group has always emphasized the concept of "full life-cycle service". The convenience of later maintenance is considered from the GRC detailed design stage, such as optimizing component joint design and reserving access channels for cleaning and inspection. To date, Qinglong has provided GRC cleaning and maintenance services for more than 200 landmark projects nationwide. Among them, through scientific maintenance, the Dongguan Women and Children's Activity Center project has kept its GRC decorative components retaining more than 90% of their original appearance quality after 10 years.

Scientific cleaning is the guardian of the aesthetic value of GRC materials. Backed by 28 years of industry experience, Qinglong Group will continue to provide customers with full-chain solutions from design to maintenance, so that every GRC decorative element remains fresh over time and showcases the timeless charm of architecture. Choose professionalism, choose Qinglong—your trusted full-solution supplier of UHPC/GRC/GRG/GRP materials.