What Treatments Should Be Strengthened for GRC Decorative Panels in Humid Environments? Moisture-Proof and Anti-Corrosion Treatment Solutions and Practical Standards

Humid environments (such as underground spaces, areas around bathrooms, and coastal regions) can easily cause GRC decorative panels to become damp, develop mildew, and lose strength, and may even lead to steel reinforcement corrosion, panel cracking, and other problems, requiring targeted moisture-proof and anti-corrosion treatments. Drawing on experience from humid environment projects such as the Xinjiang River Ecological Restoration in Yiyang County and Hainan Poly Peninsula No. 1, Qinglong analyzes the core treatment measures and practical specifications to ensure long-term stability of the components.

I. Core Impact of Humid Environments on GRC Decorative Panels

Humid environments damage GRC decorative panels in multiple ways. In terms of surface performance, prolonged dampness causes surface moisture and mildew, affecting appearance; high-salt-fog coastal environments can also cause surface whitening and corrosion. In terms of internal structure, moisture penetration reduces the strength of the cement matrix. Qinglong's test data show that GRC panels placed long-term in a 90% relative humidity environment lose 10%-15% of their strength. Metal connectors are prone to corrosion, causing loose connections and posing a risk of panel detachment. Sealants easily age and fail in humid environments, creating leakage risks and further aggravating the damage.

II. Moisture-Proof Optimization of Raw Materials and Production

Improving the moisture resistance of GRC decorative panels at the source. Raw material optimization: select low-water-absorption cement and aggregates, and add high-efficiency waterproofing agents (dosage 0.5%-1%) to reduce material water absorption; Qinglong's dedicated moisture-proof formulation can reduce GRC panel water absorption to below 8%. Production process optimization: use high-pressure vibration molding to ensure panel density ≥97%, reduce porosity, and prevent moisture penetration. Surface pretreatment: apply a penetrating sealing primer to the panel surface during production to seal capillary pores and form an initial moisture barrier; the GRC components in humid areas of the Nanning Liyuan Hotel adopted this pretreatment scheme.

III. Strengthened Moisture-Proof and Anti-Corrosion Measures During Installation

Targeted moisture-proof treatments are strengthened during installation. Connector protection: use 304 or 316 stainless steel connectors to avoid corrosion, and apply anti-corrosion coatings to connector surfaces to further enhance corrosion resistance. Installation gap filling: use hydrophobic foam strips and weather-resistant sealant to ensure sealed waterproofing, with drainage grooves at the bottom of gaps to promptly discharge infiltrated water. Back panel treatment: apply a moisture-proof coating to the back of GRC panels or install a moisture-proof cushion layer (such as PE film) to block water vapor intrusion; in coastal areas, anti-corrosion coatings should also be applied to the installation surface. In the Singapore National Defence Service Centre project, Qinglong effectively resisted the effects of high humidity and high salt fog through these measures.

IV. Moisture-Proof Maintenance Strategies for Long-Term Upkeep

Establish a long-term maintenance mechanism to extend the service life of GRC panels in humid environments. Regular inspections: check the condition of surface moisture-proof coatings and sealants quarterly, and promptly repair any aging or cracking found. Cleaning and care: regularly clean surface stains and mildew using neutral detergents, avoiding corrosive cleaners that could damage the moisture-proof layer. Damage repair: promptly repair surface damage using dedicated moisture-proof repair agents to ensure the repaired areas match the original panels in moisture resistance. Qinglong provides specialized maintenance services for humid environment projects, ensuring the long-term stable performance of GRC decorative panels through full-cycle moisture-proof treatment.