Official SGS Test Report: Flexible Stone Water Absorption Rate Reaches 11.3%
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Read the official SGS water absorption test report for our Flexible Stone. Tested under GB/T 9966.3-2020, the 11.3% rate ensures structural stability and freeze-thaw resistance for exterior Facade Retrofit projects.
1. Report Overview
This article presents the official SGS test report (Report No. GZIN2511002042CM01-1_EN) evaluating the water absorption rate of our Flexible Stone. Conducted by SGS-CSTC Standards Technical Services Co., Ltd., the test confirms that our material exhibits a water absorption rate of 11.3%. In Flexible Stone Engineering, this controlled absorption rate is crucial for ensuring the material’s dimensional stability and longevity when applied to exterior walls in Facade Retrofit projects.
2. Data Analysis: Why 11.3% Water Absorption Matters
According to the test results, the Flexible Stone demonstrated a water absorption rate of 11.3% after being fully immersed in water for 48 hours.
Engineering Value for Facade Retrofit:
- Excellent Freeze-Thaw Resistance: Exterior cladding is constantly exposed to rain and temperature fluctuations. While the material absorbs a small amount of water (11.3%), its exceptional flexibility (proven in our 200mm mandrel test) allows it to absorb the stress caused by water freezing and expanding inside the micropores, preventing cracking or spalling in cold climates.
- Minimized Efflorescence: The controlled absorption rate prevents excessive water penetration into the wall structure, significantly reducing the risk of efflorescence (white salt deposits) that often ruins the aesthetic of traditional masonry facades.
3. Test Methodology
The SGS evaluation was conducted strictly under the Chinese national standard GB/T 9966.3-2020 (Section 6.1), which specifies the test methods for the water absorption of natural stone and composite materials.
- Test Standard: GB/T 9966.3-2020 Section 6.1
- Dry Condition: The sample was dried in an oven at 65°C for 48 hours and then cooled in a desiccator.
- Impregnation Condition: Water was gradually added (to half thickness for 1h, three-quarters for 1h), and finally, the sample was fully submerged (25mm above its height) for 48 hours.
- Test Result: 11.3% (Pass)
Note: The test report explicitly states that it is intended for internal quality control and R&D. For official bidding or compliance verification, the specific SGS report number (GZIN2511002042CM01-1_EN) should be referenced.
4. FAQ
Q1: Is an 11.3% water absorption rate considered high for exterior cladding?
A: For composite materials like Flexible Stone, an 11.3% rate is well within acceptable engineering limits for external applications. Unlike rigid ceramic tiles that crack if water penetrates, the micro-porous structure and flexibility of our material safely accommodate water absorption without compromising structural integrity.
Q2: Can Flexible Stone be used in freezing or cold climates?
A: Yes. Because of its high flexibility (tested with a 200mm mandrel), the Flexible Stone can withstand the expansion of freezing water within its micropores without cracking. It has been successfully applied in various climates globally, including freezing winter regions.
Q3: Will water absorption cause the wall to develop efflorescence (white alkali)?
A: Flexible Stone is designed to minimize the risk of efflorescence. By controlling the water absorption rate and utilizing a dense surface finish, it prevents excessive water from penetrating deep into the underlying wall, thereby reducing the conditions that cause alkali migration.
Q4: How does this test compare to the material’s fire resistance?
A: Water absorption and fire resistance are distinct but complementary properties. Our Flexible Stone is both non-combustible (achieving A2-s1, d0 rating) and structurally stable under moisture, making it a highly reliable, all-weather solution for Facade Retrofit.