The amount of pulls you can get from VFI urethane rubber depends on the properties, what you’re using it for, and how you take care of it. To prolong the life of the mold, you’ll need to use adequate release after each cast so as not to damage the mold or casting. When you store the mold when it’s not in use, you’ll want to keep it in a clean, room temperature-controlled environment. Choosing the proper hardness will also lengthen the life of the mold.