The experts at Travertine Power Clean know that the best and only recommended way to seal grout is to color seal grout with a concrete stain that is the same color as the original grout.This serves as a coatingAny sort of topcoat sealer,including enhancers that are overapplied,causing a buildup on the surface.More for the grout, which not only seals it off,but also makes the grout look brand new and easier to clean. Clear penetrating sealers are not recommended.