Hydroxypropyl Methylcellulose : As the water-retaining agent and retarder of cement mortar, it enables mortar to own pumping capability. In cement mortar, gypsum slurry, putty powder or other building materials, it can function as adhesives to enhance smearing capacity and prolong operable time. In ceramic tiles, marble and plastic decoration, hpmc can be used as pasting strength agent and reduce the cement content. Water retention capacity of hpmc helps to prevent the crazing of slurry resulting from drying quickly and to enhance the strength after hardening.