The Molar Group was conceived as inexpensive, lightweight furniture for a mass audience. Castle created his own inexpensive one-piece molds into which workers first sprayed a thin layer of polyester color (or gel coat) then a mixture of fiberglass-reinforced polyester. The finished piece was popped out of the mold after the plastic had hardened. Castle also preferred one-piece molds as they produced bulbous forms that sat on the ground like rocks, a natural metaphor he wanted for aesthetic reasons. Eventually comprising settees, chairs, shelves, and tables, the Molar Group was marketed and sold primarily by Beylerian, Ltd., who subcontracted the manufacturing of the furniture to a factory in Syracuse.