Sealing Treatment Methods for GRC Panel Connections with Metal Components? Anti-Seepage Design and Qinglong Group Connection Technology

The sealing treatment for GRC panel-to-metal component connections requires a triple protection system of "physical isolation, elastic sealing, and drainage with ventilation," with the core measures being the use of elastic sealant (movement capability ≥25%), installation of isolation gaskets (thickness ≥2mm), and provision of drainage holes (spacing ≤1m). In the roofing project of the Hainan International Convention and Exhibition Center, Qinglong Group adopted silicone sealant (durability ≥25 years), EPDM gaskets (compression set ≤20%), and stainless steel ventilation valves, keeping 12,000 connection points leak-free over 10 years in a high salt spray environment. Sealing treatment not only prevents rain and dust intrusion but also mitigates galvanic corrosion, serving as a key guarantee for the durability of connection points.

Material Selection and Compatibility Testing

The sealant must achieve adhesion ≥0.5MPa to GRC and metal, and gaskets must be ozone-resistant and aging-resistant. We conduct accelerated aging tests to ensure material compatibility. In coastal projects, neutral silicone sealant is selected to avoid acid corrosion.

Structural Design and Construction Control

The joint width-to-depth ratio is 1:2, and the backer rod diameter is 1.2 times the joint width. Application temperature is 5-40°C with relative humidity of 40-80%. Qinglong Group trains professional sealant application teams, all certified for the job, to ensure construction quality.

Long-Term Performance of the Qinglong Sealing System

Sealing records are established with regular inspection and maintenance. In the Wuhan Han Show Theatre project, the sealing system remained intact after 8 years. Systematic sealing is the guarantee of century-long safety for connection points.