First of all, clear liquid waterproofing products are not designed to function in below-grade applications. Secondly, liquid waterproofing materials are not designed to fill holes or voids in faulty mortar joint areas. These products are designed to penetrate the substrate, not to create a surface film or sealant coat. As previously discussed, care should be taken to assure the proper tooling of mortar joints.
Lastly, liquid waterproofing products do not demonstrate maximum efficiency under standing water conditions. Product application, therefore, upon horizontal masonry surfaces is not warranted. As an example, typical rainfall upon a masonry window ledge will result in an average of one-eighth inch of standing water during the storm.