Abstract: A process for producing and curing hydraulic material to reduce its hydrophilic characteristics and increase its strength. By preventing water loss and by adding water, efflorescence is controlled and the number of and size of voids created by water evaporation and hydration are reduced. Controlling the cure environment, humidity, temperature and pressure and using fluid barriers and water, control the physical and chemical composition formed during curing. The controls can be used before and/or after the initial set or shape formation of the hydraulic material.