511 Seal & Enhance Is a unique . solvent-base formula designed to eliminate the need to use an impregnator before using a color enhancer for maximum stain protection and superior color enhancement. 511 Seal & Enhance is safe for use on granite . marble . limestone . natural stone . slate . ceramic tile . quarry tile and grout surfaces. 511 Seal & Enhance will enhance the color and rejuvenate the appearance of tumbled . honed . acid-washed . sandblasted . flamed . textured . even polished stone and tile surfaces. In addition . 511 Seal & Enhance revitalizes old and worn stone and tile installations. It can be used successfully in both interior and exterior environments and is freeze/thaw resistant.