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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Test method for buildingsealants--Part 16:Determination of resistance to compression
Standard published on 17.12.2002
Selected format:Test method for building sealants—Part 17Determination of elastic recovery
Standard published on 9.3.2017
Selected format:Test method for building sealants Part 18:Determination of adhesion-in-peel
Standard published on 17.12.2002
Selected format:Test method for building sealants—Part 19Determination of change in mass and volume
Standard published on 12.7.2017
Selected format:Test method for building sealants—Part 2:Determination of density
Standard published on 28.12.2018
Selected format:Test method for building sealants—Part 20Determination of staining
Standard published on 12.7.2017
Selected format:Test method for building sealants—Part 21Determination of color change after laboratory accelerated weathering procedures
Standard published on 11.7.2022
Selected format:Test method for building sealants—Part 22Determination of curing behaviour
Standard published on 30.12.2022
Selected format:Test method for building sealants—Part 23Durability to extension compression cycling under accelerated weathering
Standard published on 30.12.2022
Selected format:Test method for building sealants—Part 25: Determination of resistance to mold
Standard published on 29.9.2024
Selected format:Latest update: 2026-04-02 (Number of items: 2 270 295)
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