1.1 本试验方法包括在循环高温和低温老化后测定单组分、弹性体、溶剂释放型密封剂的低温柔韧性。 1.2 具有管辖权的小组委员会不知道有任何类似的ISO标准。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本试验方法的目的不是模拟实际使用条件，但它将对建筑接缝密封胶在低温下的弹性特性或灵活性给出一些指示。它可以用于区分基于弹性体的密封剂和基于非弹性粘合剂的密封剂，非弹性粘合剂在低温下弯曲时会在老化和开裂时硬化或脆化或失去附着力。此外，它可以帮助识别弹性较差的密封剂，因为它们过度伸展，并且含有极低水平的弹性粘合剂，以及那些粘合剂在低温下会脆化的密封剂。

1.1 This test method covers determination of the low-temperature flexibility and tenacity of one-part, elastomeric, solvent-release type sealants after cyclic high- and low-temperature aging. 1.2 The subcommittee with jurisdiction is not aware of any similar ISO standard. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method is not intended to simulate an actual use condition but it will give some indication of the elastomeric properties or flexibility of a building joint sealant at low temperature. It can serve to differentiate between elastomer-based sealants and sealants based on nonelastic binders that can harden or embrittle on aging and crack or lose adhesion when flexed at low temperature. In addition, it can aid in identifying sealants that have poor flexibility because they are overextended and contain a very low level of elastomeric binder as well as those sealants having binders that will embrittle at low temperature.