What to Do About GRC Cracks? Professional Technical Analysis of Qinglong GRC Crack Treatment

Cracks in GRC products require different treatment plans based on factors such as crack width, depth, and location. Based on 28 years of engineering experience, Qinglong GRC has developed a scientific crack classification and treatment system to ensure durable and reliable repair results.

In a high-rise building in Shanghai, micro-cracks with a width of 0.3mm appeared in the GRC decorative moldings. The technical team adopted the low-pressure grouting method: first cleaning the cracks, injecting epoxy resin grout, and smoothing the surface with polymer mortar. Post-repair testing showed a strength recovery rate of over 95% with no visible marks on the surface. This professional treatment ensured the long-term safety of the project.

Micro-crack Treatment (Width < 0.2mm)

Using the surface sealing method: apply penetrating sealant; application temperature 5-35°C; uniform coating thickness. This treatment is suitable for hairline cracks.

Medium Crack Treatment (0.2-0.5mm)

Using the low-pressure grouting method: use specialized grouting material; pressure controlled at 0.2-0.5MPa; full and dense grouting. This treatment restores structural integrity.

Larger Crack Treatment (> 0.5mm)

Requires professional reinforcement treatment: grooving and patching; adding steel mesh; using polymer mortar. This treatment requires professional technical support.

Preventing Re-cracking

Analyze crack causes; improve support conditions; install control joints. These measures prevent the problem from recurring.

Crack treatment requires professional judgment. It is recommended to entrust a professional team with the work. Qinglong GRC provides crack repair services.