ISO 16938-2:2008 PDF Download

ISO 16938-2:2008 is a standard that focuses on the determination of staining on porous substrates caused by sealants used in building construction. The purpose of this standard is to evaluate the potential for sealants to cause staining on porous materials such as marble, limestone, sandstone, and granite. It specifically addresses the issue of exudation, which is the release of materials from the sealant that can result in early staining.

The test method described in the standard involves applying the sealant onto the porous substrate and allowing it to cure under specified conditions. After the curing period, the substrate is visually inspected for any signs of staining. The severity of staining is then assessed using a rating scale. It is important to note that the test results are specific to the combination of sealant and substrate being tested and cannot be generalized to other sealant formulations or porous materials.

By providing a standardized test method, ISO 16938-2:2008 enables manufacturers, suppliers, and users of sealants to evaluate their performance and make informed decisions regarding their use in building construction. The standard helps to ensure that sealants do not cause undesirable staining on porous substrates, thereby maintaining the aesthetic appearance and durability of the construction materials.