Mack's cement
Hard, quick-setting cement made of dehydrated gypsum to which is added a small percentage of calcined sodium sulfate and potassium sulfate; used for walls, and for floors, when mixed with sand.
Hard, quick-setting cement made of dehydrated gypsum to which is added a small percentage of calcined sodium sulfate and potassium sulfate; used for walls, and for floors, when mixed with sand.