Life Specialty Coatings LD5 50 lb Light Gray Life Deck Specialty Coatings LD5 Cement. Life Deck Specialty Coatings cements are formulated for high PSI applications and blended with a variety of silica sand and proprietary additives. LD-5 (light grey) is generally used for grout lines, staining dark colors, decorative overlays, texturing or broom finish systems.