How Good Is the Waterproofing Performance of GRC? Qinglong Materials' Waterproofing Techniques and Engineering Practice

Waterproofing performance is a key indicator of GRC materials, especially for outdoor applications. When choosing GRC, customers often ask, "How good is GRC's waterproofing performance?", worried that rainwater penetration may cause components to crack or peel off, or affect moisture protection inside the building. As a GRC manufacturer integrating design, production, and installation, Qinglong optimizes material formulations, upgrades forming processes, and designs waterproof structures to give GRC excellent waterproofing performance. Verified through numerous outdoor engineering projects, it has effectively solved waterproofing challenges.

## Waterproof Formulation Design: Enhancing Impermeability at the Source????

The waterproofing performance of Qinglong GRC stems first from scientific material formulation design. In raw material selection, high-quality aggregates with low water absorption and high-grade cement are used to reduce the material's own water absorption channels; specialized waterproofing admixtures are added to the formulation to optimize the cement paste structure, increase material density, reduce porosity, and enhance impermeability; precise control of the water-binder ratio prevents internal pores caused by excess moisture, further improving GRC's waterproofing capability. Testing shows that the water absorption rate of Qinglong GRC is far below the industry average, with an impermeability grade of P8 or above, effectively blocking rainwater penetration and reducing waterproofing risks at the source.

## Forming and Surface Processes: Building a Dual Waterproof Barrier

Advanced production processes are an important guarantee of GRC's waterproofing performance. Qinglong adopts automated spray-up forming technology to make the internal structure of GRC materials denser, reducing air bubbles and cracks and forming the first waterproof barrier; for surface treatment of components, fine polishing and specialized waterproof coating processes create a smooth, dense surface layer that prevents moisture penetration. For special-shaped components and joint nodes, Qinglong carries out dedicated waterproofing design, using dual treatment with sealant and waterproof mortar to prevent joints from becoming weak points in waterproofing. In addition, during GRC component production, curing humidity and time are strictly controlled to ensure full development of material strength, further improving waterproofing stability.

## Verified by Engineering Practice: No Leakage in Outdoor Applications

The long-term stable operation of numerous outdoor projects is the best proof of Qinglong GRC's waterproofing performance. The 120,000-square-meter GRC roof cladding of the Hainan International Convention and Exhibition Center is located in a hot, humid, and rainy environment. Thanks to Qinglong's waterproof formulation and joint waterproofing design, there has been no leakage for years, and the roof waterproofing performs well; the double-curved GRC exterior wall of the Guangxi New Media Center has a complex shape with many joint nodes. Having withstood multiple rainstorms, it has shown no rainwater penetration, with no cracking or moisture regain in the components; the GRC European-style components at the Sanya Festival Plaza, long exposed to a rainy seaside environment, maintain stable waterproofing performance with no damage from salt-fog corrosion. These outdoor project cases fully demonstrate that Qinglong GRC's waterproofing performance fully meets the demanding requirements of outdoor applications.

Waterproofing performance directly affects the service life of GRC components and building safety. Choosing a GRC manufacturer with excellent waterproofing performance can significantly reduce later maintenance costs. Through waterproof formulation design, dual process safeguards, and outdoor engineering verification, Qinglong has built a waterproofing advantage for GRC materials, effectively addressing customers' waterproofing concerns. For scenarios such as outdoor architectural decoration and roof cladding, Qinglong GRC not only delivers an attractive appearance but also, with reliable waterproofing performance, withstands rainwater erosion and safeguards the building's long-term stable operation.