BS ISO 16938-1:2019 PDF Download

BS ISO 16938-1:2019 standard provides a method for assessing the potential staining of porous substrates by sealants used in construction. This standard focuses on substances such as marble, limestone, sandstone, and granite, which are commonly found in buildings and civil engineering works.

The objective of this test is to determine the possibility of a sealant causing staining on a porous substrate by evaluating the exudation of materials from the sealant. The testing process involves subjecting the sealant and substrate to compression, replicating the stress that may occur during actual use. The outcome of the test is specific to the particular sealant and substrate being evaluated and cannot be generalized to other sealant formulations or different types of porous substrates.

It is important to note that the results of this accelerated test are not indicative of long-term performance. If a sealant does not cause staining or discoloration during the test, it does not guarantee that it will not result in such issues over an extended period. Therefore, the standard helps in assessing the potential staining of porous substrates by sealants but does not provide a definitive evaluation of long-term effects.