Mercury Molds FRP LLC. | 44 followers on LinkedIn. Mercury Molds provides high-quality fiberglass reinforced products in a timely manner and to the highest standards. | Mercury Molds was conceived by JB Currell and Charles Perry, leaders in custom mold manufacturing. JB got his start as a fiberglass mold manufacturer called Gibco Flex-Mold, specializing in non-skid patterns. Charles is the second generation at Southwind a manufacturer of custom molded urethane parts.