A multi-cavity mold, also called a gang mold, refers to a mold that has more than one cavity. This enables a number of castings to be made from a single mold. The instructions below show a very simple method for making a five cavity mold by pressing the models into a plastic food storage container lined with Silicone Plastique®. Tip: Silicone Plastique® has a work time of 15-20 minutes and cures in 60-75 minutes. Because this project is a little more complex in nature, you may need more time to properly make this mold. By refrigerating the Silicone Plastique® before combining, the curing action of the silicone rubber is slowed allowing more time to complete the process.