A topical concrete sealer is often referred to as a coating because it leaves behind a visible surface film, usually in the form of a clear or colored low or high gloss finish. A penetrating sealers is much different from a topical sealer because a penetrating sealer will work entirely below the surface from within the pores, leaving the surface of the concrete exposed. Penetrating sealers help to reduce common issues where as topical concrete sealers, or coatings, help to stop common issues. If you are looking for a penetrating sealer, please view our line of DOT-Approved water repellent sealers and concrete densifiers.