Five pounds of Hydrocal FGR-95 is the stuff that I have been using to cast the pieces from the mold. This week the target was to cast the mold three times a day. Once before I leave for work once at lunch, and again at night. This system has been working out very well. So well in fact that I have run out of the plaster. This has put things at a stand still. I am hoping that I can pick up a 50lb box of plaster at a cheap price I hope that will be more than enough to complete the project.