Siena Sanded Grout GS300 is a polymer-enhanced premium grout that requires only the addition of water for professional performance. Siena Sanded Grout GS300 is used for grouting tile joints of ⅛” to ½” wide for interior and exterior applications of most types of tiles and stone. Siena Sanded Grout GS300 can be used on floors and walls of residential and commercial projects. Siena Sanded Grout GS300 is available in 36 premium colors and complies with the requirements of ANSI A118.6.