In order to satisfy the demands of Boston's high-tech industries for low-volume, quick-turn, close-tolerance plastic parts, two brothers founded what is now Polymer Corporation in 1979 and invented the revolutionary Liquid Resin CastingTM method. From that modest, family-run company, Polymer has grown into a sizable enterprise that is controlled by management and Prospect Partners, a top private equity firm. With an exclusive focus on producing high-precision plastic parts and assemblies in quantities ranging from less than a hundred to more than a million annually, we provide machining, injection molding, Liquid Resin CastingTM, rapid prototypes made with state-of-the-art additive manufacturing technologies, and fully functional quick-turn ProtoPartsTM. Polymer operates from sites in Massachusetts and Connecticut and is registered with ISO 9001:2015, AS9100D, ITAR, and UL.