本文件规定了建筑施工中使用的密封剂对多孔基材（如大理石、石灰石、砂岩或花岗岩）染色的测定方法。该方法评估密封剂因密封剂中的材料渗出而在多孔基材上造成早期污渍的可能性。试验结果特定于受试密封剂和受试基质，不能外推至其他密封剂配方或其他多孔基质。在加速试验期间，如果密封剂不会使基材染色或变色，并不意味着测试密封剂不会在更长时间内使测试多孔基材染色或变色。

This document specifies a method for determining the staining of porous substrates (e.g. marble, limestone, sandstone or granite) by sealants used in building construction. The method evaluates the likelihood of a sealant causing an early stain on a porous substrate due to exudation of materials from the sealant. The outcome of the test is specific to the tested sealant and tested substrate and cannot be extrapolated to other sealant formulations or other porous substrates. During this accelerated test, if the sealant does not stain or discolour the substrates, it does not mean that the tested sealant will not stain or discolour the tested porous substrate over a longer time period.