Ever wonder how clamshell packaging is made? In this video we demonstrate how to 3D print a "living hinge" clamshell design and seal it with XTC-3D epoxy coating, mold it with Mold Star 30 platinum silicone, and then cast a high-performance temperature-resistant vacuum forming tool with EpoxAcast 655 HT aluminum-filled epoxy resin that can be used again and again.