Laticrete® 335 SUPERFLEX is a high performance polymer fortified cementitious powder to be mixed with water when fixing all types of wall & floor tile & stone, including low absorption porcelain & vitrified tiles & natural stone where the WHITE version of 335 is particularly recommended for light stone & marble. Laticrete SUPERFLEX 335 is ideal when fixing over fully braced 18mm WBP Plywood; sub-floor heating; tiles fully immersed in pools or in external locations.