1.1 本试验方法涵盖了一个加速实验室程序，以确定当接缝密封剂样品与砌体、混凝土或石头（如大理石、石灰石、砂岩和花岗岩）接触时，是否会污染基材。该试验方法还旨在确定当暴露在天气中时，密封剂本身是否会变色。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 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。 1.4 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 建筑物上的污渍在美学上是不可取的。本试验方法评估了由于密封剂的某些化学渗出物，密封剂在多孔基材上引起早期着色的可能性。 4.1.1 本试验方法可能无法预测由密封剂渗出物产生的残留物或污垢等因素引起的染色。 4.2 该试验方法有助于预测风化后密封胶本身的潜在颜色变化。 4.3 本试验方法测量人工风化条件下密封剂的颜色变化和密封剂对基材的染色。另见测试方法 D2203 ，它测量由于密封剂的总渗出而被密封剂染色；它不会使密封剂经受人工风化。

1.1 This test method covers an accelerated laboratory procedure to determine if a sample of a joint sealant will stain the substrate when in contract with masonry, concrete, or stone (such as marble, limestone, sandstone, and granite). This test method also is intended to determine whether the sealant itself will change in color when exposed to the weather. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. 1.4 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 Staining of a building is an aesthetically undesirable occurrence. This test method evaluates the likelihood of a sealant causing early stain on a porous substrate due to certain chemical exudations from the sealant. 4.1.1 This test method may not predict staining caused by such factors as residue run-down or dirt pick-up by a sealant exudate. 4.2 This test method is useful to predict potential color changes in the sealant itself after weathering. 4.3 This test method measures color change in a sealant and staining of substrate by the sealant under conditions of artificial weathering. See also Test Method D2203 , which measures staining by a sealant due to gross exudations from the sealant; it does not subject the sealant to artificial weathering.