Contractor’s Choice Multi-Purpose Thin-Set Mortar is a polymer-modified latex-Portland cement mortar. This product is an economical, multi-purpose mortar formulated specifically for the installation of ceramic and/or mosaic tiles, quarry stone, and dimension stone (absorptive, semi-vitreous, and vitreous) tiles. It may be used for either floors or walls, in both interior and exterior applications where a latex-Portland cement mortar is required.