A single component, high performance, polymer modified dry-set mortar to be mixed with water only. Ultra/Flex 2 has a high content of dry polymer. This results in excellent bond capacity which exceeds ANSI 118.4 requirements. For interior vertical and horizontal tile installation of stone, ceramic, porcelain and quarry tile installation over most traditional, well prepared, non-deflecting substrates such as plywood, cured concrete, masonry and cement backer units. For renovation in interior installations over properly prepared and well bonded unglazed tile, cement terrazzo, VCT, VAT and cutback adhesive residue.