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

Guarding Architectural Aesthetics: A Complete Guide to GRC Surface Cleaning — Industry Experts with 28 Years of Experience Teach You Scientific Maintenance

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its outstanding molding capability and durability, has become the preferred material for high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, GRC surfaces exposed to the natural environment for long periods easily accumulate dust and stains, which not only affects the building's appearance but may also cause material damage due to improper cleaning. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group will systematically analyze scientific GRC cleaning solutions based on material properties, helping you extend material life and preserve the building's original appearance.

The Unique Cleaning Requirements of GRC Materials: Why Don't Ordinary Methods Work?

GRC is composed of a cement-based matrix and glass fibers. Its porous surface structure easily absorbs pollutants, while the presence of glass fibers imposes strict requirements on the acidity/alkalinity and friction intensity of cleaning agents. Ordinary high-pressure water jetting may cause the surface cement layer to peel off, and strong acid or alkaline cleaners will corrode the fiber structure. Qinglong Group considers later-stage maintenance needs as early as the detailed design stage, optimizing material density by adjusting the mix ratio to reduce cleaning difficulty — a forward-looking embodiment of a national high-tech enterprise in material R&D.

Four-Step Scientific Cleaning Method: From Daily Maintenance to Deep Stain Removal

1. Daily Dust Removal: Dry Wiping Combined with a Soft Brush
For surface dust, it is recommended to gently wipe with a slightly damp microfiber cloth or a soft brush (hardness ≤3H), cleaning in one direction to avoid scratches. The surface of Qinglong GRC components is treated with a special process; in daily maintenance, a neutral anti-dust spray can be applied once a month to effectively reduce dust adhesion. This method is also suitable for maintaining GRG indoor decoration components.

2. Moderate Stain Treatment: Proper Use of Neutral Cleaners
For rain marks and light oil stains, prepare a neutral cleaner with a pH value of 6-8 (such as a dedicated GRC cleaning agent or diluted baby body wash), apply it with a sponge using circular motions, then wipe twice with clean water. Avoid using abrasive cleaning tools — this is a key operating standard summarized by Qinglong's after-sales maintenance team.

3. Removing Stubborn Stains: Targeted Solutions
For stubborn stains such as bird droppings and rust, first gently scrape off surface deposits with a plastic scraper, then apply a dedicated descaling agent locally (e.g., an oxalic acid solution diluted to below 5%), leave it for 3 minutes, and wipe clean with a soft cloth. After treatment, rinse thoroughly with clean water to prevent chemical residue — this process has been proven effective in award-winning projects undertaken by Qinglong, such as the Dongguan Women and Children's Activity Center.

4. Deep Maintenance: Periodic Treatment by Professional Teams
It is recommended that a team qualified for GRC maintenance carry out a deep cleaning once a year, using low-pressure spray rinsing (water pressure ≤0.3MPa) combined with nano-scale protective agent spraying to form a protective layer. Qinglong Group's Guangxi production base is equipped with a professional maintenance team that provides full-process services from inspection and assessment to protective construction — an important embodiment of the “full-chain service” philosophy.

Three Taboos and Five Precautions

During cleaning, strictly avoid three taboos: do not use hard tools such as steel wool or stiff brushes; avoid cleaning in high-temperature (＞40℃) or low-temperature (＜5℃) environments; never mix different types of cleaning agents. Also note the following: test on a concealed area before cleaning; carry out large-area cleaning in sections; promptly remove standing water at joints; regularly check the integrity of sealing rubber strips; and establish cleaning records to log maintenance cycles — these details reflect Qinglong's rigorous control of engineering quality as a “specialized, refined, distinctive, and innovative” enterprise.

As a member of the International GRC Association, Qinglong Group has always believed that scientific maintenance is the key to maximizing the value of GRC materials. From the translucent concrete project at Century Plaza on Nanjing East Road to custom-shaped components exported overseas, Qinglong not only provides high-quality GRC products but also leverages 28 years of accumulated experience to offer customers full life-cycle support from design to maintenance. Guarding architectural beauty so that every GRC decoration endures and stays new — this is a vivid practice of the “Creating Aesthetic Architecture” mission.