"Do not exceed mixing ratio of 1 part Oxide to 10 parts cement by weight as thiswill weaken the mix. Recommend plaster mix is 6 parts aggregate (sand plus oxide) to 1 part cement. Recommended decorative screed mix is 4 parts aggregate (sand plus oxide) to 1 part cement. For plaster and cementitious paint applications thoroughly clean surfaces with Powafix Mortar Off. Use product directions displayed on respective products. Cement Oxides are also compatible with Powafix white cement andplaster of Paris."