1.1 本规范涵盖了与建筑密封用冷液体密封剂一起使用的圆柱形密封剂背衬的基本要求。 1.2 圆柱形密封剂背衬具有以下一种或多种功能: 1.2.1、 限制应用到接缝中的密封剂的量和深度， 1.2.2 起到粘合破坏器的作用，以允许接缝运动而不会对密封剂产生过度应力， 1.2.3 提供一种形式，以帮助密封剂形成适当的形状系数，以及 1.2.4 充当密封剂通过接头流动的屏障。 1.3 对本标准具有管辖权的委员会不知道其他ASTM委员会或其他组织发布的任何类似标准。 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）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 本规范旨在说明各种圆柱形密封剂衬垫的性能差异。 5.2 尽管本规范规定了圆柱形密封剂背衬的使用条件，但并未说明背衬与将要接触的密封剂的兼容性。密封剂的兼容性应由密封剂制造商确认。与圆柱形密封剂衬垫接触的密封剂的相容性特性可通过试验方法确定 2008年 。

1.1 This specification covers the basic requirements for cylindrical sealant backing to be used with cold liquid applied sealants for use in building seals. 1.2 Cylindrical sealant backing serves one or more of the following functions: 1.2.1 Limits the amount and depth of sealant applied into a joint, 1.2.2 Acts as a bond breaker to allow joint movement without undue stress to the sealant, 1.2.3 Provides a form to assist the sealant in developing the proper shape factor, and 1.2.4 Acts as a barrier to the flow of sealant through the joint. 1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other ASTM committees or other organizations. 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 ====== 5.1 This specification is designed to give some indication as to the differences in performance for various cylindrical sealant backings. 5.2 Although this specification qualifies a cylindrical sealant backing for use, it does not address the compatibility of the backing with the sealants with which it will make contact. Sealant compatibility should be confirmed by the sealant manufacturer. Compatibility characteristics of sealants in contact with cylindrical sealant backings can be determined by Test Method C1087 .