Two-Shot Injection Molded Products

Over the past three decades, Thumb Plastics has mastered the two-shot injection molding process. But we’re more than a mass production manufacturer. Sure, we’re great at producing parts, but where we shine is in engineering value into your injection molded products. Leveraging the knowledge and experience of all Gemini Group companies gives us the unique ability to optimize part design, drive cost out, and reduce lead-times.


We’re part of a horizontally integrated network of experts and we’ll never compromise the integrity of your product in favor of a pet process or raw material.

Our part design and engineering innovations can be found in a variety of industries including automotive, agriculture, lawn and garden, industrial, and medical. Here is just a small sample of our work in automotive:

  • Expanding Structural Solutions (Sorb Rocker & Pillars)
  • Expanding Sealing Solutions (Baffles & Carriers)
  • Air Induction Bellows/Cuffs
  • Airbag covers
  • Stone/Mud guards
  • Air guide seals
  • Spoiler strakes

Using two-shot injection molding process, Thumb Plastics can produce two-component or two-color plastic injection molded parts in one machining cycle, reducing overall cycle time and eliminating additional assembly costs. Two-shot is the ideal process for the high-volume production of products with rigid and flexible components, multiple colors and surface grades, vibration and noise dampening characteristics, and sealing functionality.

Using the insert molding process, Thumb Plastics can mold plastic directly on to metal components and assemblies, eliminating the need for messy adhesives and fasteners. Insert molding is the ideal process for adding plastic grips and handles to metal parts, or metal fasteners, magnets, and structural reinforcements to plastic products.

Engineering Success

Got an idea for a part requiring the innovation of two-shot? Not sure where to start? Thumb Plastics has the design and manufacturing experience to help solve your company’s product dilemma and give you a competitive advantage. We believe in proactive communication and collaboration early on in the design and engineering phase. This allows us to incorporate DFM right from the start, eliminating potential problems before they add to your cost and development time.


Want to build quality and low cost into your product? Put us to work for you!