What Are the Watering Curing Frequency Requirements for GRC Panels: Proper Curing Frequency and Operation Guide Explained

Scientific curing is the cornerstone of GRC panel longevity, and standardized water curing can improve material performance by more than 30%. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its full-chain technical expertise to explain the core points of GRC panel maintenance.

In the field of architectural decoration, GRC (Glass Fiber Reinforced Concrete) is widely used for exterior wall cladding panels and landscape components of grand theaters, commercial complexes, and landmark buildings, thanks to its lightweight, high-strength, and richly formable characteristics. However, many projects suffer from cracking and strength reduction due to improper curing, which highlights the importance of scientific maintenance. As a national high-tech enterprise, Qinglong participated in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018). Based on practical experience from an annual production capacity of 600,000 square meters, we have summarized a systematic water curing program for GRC panels.

Core Frequency Standards for GRC Panel Water Curing

Under different environmental conditions, GRC panel water curing should follow differentiated frequencies. The standard curing period is 28 days after installation, with the first 7 days as the critical curing period: in hot, dry environments, water 3-4 times daily to keep the surface continuously moist; in normal-temperature environments, twice daily, once in the morning and once in the evening; in humid environments, this can be reduced to once daily. Notably, experimental data from Qinglong's Nanning production base show that GRC panels kept at 85% relative humidity by an intelligent sprinkler system achieve 22% higher 28-day compressive strength than naturally cured panels—this is also the standard curing program we provide for projects of real estate groups such as Vanke and Poly.

Scientific Watering Operation Guide and Common Mistakes

Water curing should follow the “Three-Fixed Principle”: fixed timing (avoiding midday heat and nighttime low temperatures), fixed quantity (0.5-1L of water per square meter each time), and fixed method (using mist spraying to avoid water impact). Qinglong's deepened design team particularly reminds that high-pressure water jets should not be used for direct flushing during curing, and non-woven fabric should be used to cover panels and retain moisture. In one exhibition center project, uncontrolled water volume during initial curing caused localized efflorescence, and the appearance was only restored after Qinglong's after-sales team applied pH neutralization treatment—further confirming the importance of standardized operation.

Qinglong's Full Life-Cycle Curing Solutions

As a GRC manufacturer providing full-chain services covering deepened design, production and manufacturing, construction and installation, and after-sales maintenance, Qinglong has established a “trinity” curing system: steam curing during the production stage to ensure substrate stability, dedicated curing equipment during installation, and regular inspection services after sales. For a landmark project in Malaysia, we customized a curing program that uses BIM technology to simulate temperature and humidity changes across different seasons, linking watering frequency with local climate data, keeping the GRC curtain wall system free of noticeable aging for 15 years under a tropical marine climate.

Curing is the “protective umbrella” of GRC material performance and the guarantee of enduring architectural aesthetics. Drawing on 28 years of professional experience, Qinglong reminds all designers and owners: choosing a GRC manufacturer with full-chain service capabilities means not only obtaining quality products, but also scientific curing guidance. From deepened design to after-sales maintenance, Qinglong has always honored its commitment of “meticulous care and constant improvement,” creating architectural works that combine artistic value and durability for every project. To learn more about GRC/GRG/UHPC material applications and curing technology, welcome to follow Qinglong Group's technical column.