Published Wednesday 8th of October 2014 // Updated Friday 27th of January 2017
While concrete may seem like an extremely strong building material it is naturally porous and prone to water absorption. Beginning on the surface, concrete is filled with tiny pores and hairline cracks that extend throughout the material. While concrete may seem strong enough without any treatment, it is not as strong and protected as it can be. The tiny pores of a concrete slab and foundation can absorb water if not treated with a waterproofing concrete sealer. Basements are one of the most vulnerable areas of a home since they are at high risk of flooding, excessive mold and mildew build-up and the passage of radon gases. Since most basements are comprised of either concrete cinderblock walls or poured foundations without the proper insulation they are at high risk of the aforementioned.
The best way to remediate and prevent water absorption is to use a waterproofing concrete sealer. When looking for a basement waterproofing concrete sealer it is best to look for a penetrating sealer that will leave an invisible finish without the risk of peeling, flaking and delamination. For concrete blocks and cinderblocks the best sealer to use is the Siloxa-Tek 8500. The 8500 product is a surface applied, invisible, non-film forming protection system, that can very effectively increase the water repellency of concrete. Through the use of nano technology the active ingredients seal the pores within the substrate adequately blocking moisture while still maintaining the concretes ability to breathe.
For preventatively sealing basement floors and foundation walls the best sealer to use is the Lithi-Tek 9500. The 9500 product is a hybrid densifying, impregnating sealer used to densify, harden and prevent water from penetrating the concrete. Once impregnated the reaction process from the active silicate ingredient produces additional C-S-H (calcium silicate hydroxide) within the capillary tracts thus increasing the density and volumetric mass. The change of the surface tension elicited from the waterproofing component forms a repellent cross-linking membrane that is completely invisible, hydrophobic and able to repel water.
For sealing basement floors and foundation walls that are actively experiencing moisture issues it is best to use a two step process. Use the Lithi-Tek 4500 first as a primer, wait 7 days and then apply the Siloxa-Tek 8500 as a top coat. The combination of the two products is the best combination to locks out moisture, prevent efflorescence and resist mold and mildew.