GB/T 13477.1-2002 specifies the requirements for substrates for testing building sealing materials. The standard specifies the types of substrates suitable for different types of building sealing materials, covering common materials such as Glass, Metal, Stone, etc. Detailed description of the material characteristics, surface state, size specifications and other standards of each substrate to ensure that it can stably simulate the actual use environment in the sealing material test. Standardizing the test substrate helps to ensure the accuracy and comparability of the performance test results of building sealing materials, and provides basic support for the effective implementation of subsequent sealing material performance measurement standards.