MSMW50 Features: -Mortar. -Color: White. -Offers good bond strength for tile installation over most surfaces. -Apply over concrete, cement backer boards and existing ceramic tile. -Meets ANSI A118.11 when added at required 5 to 1 ratio. -Protected by Mold guard technology to resist mold and mildew growth. -Use with vitreous, semi-vitreous or absorptive tile, ceramic, mosaic, quarry, cement, porcelain, brick and mini-brick, precast terrazzo and natural stone. -Dimensions: 18" H x 15" W x 3.2" D.