GB/T 13477.5-2002

This standard specifies the laboratory method for determining the tack-free time of building sealants, which is the time required for the sealant surface to lose its stickiness after application. It is applied in the construction industry for quality control and performance testing of sealants used in joints, gaps, and seams in building structures, such as those around windows, doors, and curtain walls. The test ensures that sealants cure properly within a specified timeframe to prevent dirt pickup and maintain effective sealing during installation.