Despite its durability, concrete is a porous material, which means it can absorb water, chlorides, stains, and other water or oil based materials that it comes in contact with. By treating the concrete with a sealer, you can inhibit the penetration of these intruders while allowing the surface to breathe, so moisture within the concrete doesn’t become trapped. Concrete is typically sealed with either a penetrating densifying sealer or a film forming sealer.
Penetrating water-based sodium silicate solutions harden and densify concrete by chemically reacting with the calcium salts present in concrete. It can be applied in one coat or multiple coats depending on the concrete porosity and can be used on either new or existing concrete floors. Sealers actually penetrate into the concrete surface to a depth of about 1 to 4 mils to increase water repellency and resist stains on absorbent concrete. They provide invisible protection without changing the surface appearance, and can increase the surface strength of your concrete floor.
Film forming solvent and water based acrylic sealers inhibit penetration of water and contaminants such as oil, grease, and stains by forming a barrier on the concrete surface.