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Structural sealant is the most important adhesive carrier for building curtain wall, and its weatherproofing ability has been receiving much attention in the industry.
China GB 16776, USA ASTM C1184, European ETAG 002, three major silicone structural sealant standards all mentioned the use of artificial accelerated aging test method in the laboratory to evaluate the durability of silicone structural sealant. However, the artificial accelerated aging test can only reflect the changes of material properties under laboratory aging conditions, and cannot be used as the basis for judging the actual service life and quality assurance of materials. Long-term natural exposure test under extreme environmental conditions are the most reliable basis for testing products' durability.