Extruded Plastic Automotive Seals

Gemini Plastics has been developing and manufacturing extruded plastic automotive seals for over half a century. During that time, we have engineered and built over 5,000 plastic extrusion profiles and have the experience to help you match your automotive sealing components profile design to one of our existing profiles.


And, if for some reason we don’t have a good match, we have the engineering expertise and in-house tooling capabilities to help develop the right profile for your plastic extrusion application.

We manufacture a variety of Dual & Tri Durometer Extruded Automotive Seals including:

  • Sunroof seals
  • Radiator seals
  • Hood seals
  • Cowl seals
  • Instrument panel seals
  • Pillar seals
  • HVAC seals
  • Closeout seals
  • Windshield laces
  • Condenser seals

Seals │ Material Selection


There are dozens of critical performance and environmental factors to consider when determining the ideal material for your automotive seals – so, if you are unsure of which one you need, or even where to start with the selection process, we are here to help. You can get started by answering our Extruded Seal Material Selection Questionnaire, or you can contact us directly at (248) 435-7271 or

  • PP – Polypropylene
  • Glass-filled
  • Talc-filled
  • PVC – rigid & flexible
  • ABS
  • Nylon
  • PS – Polystyrene
  • Polycarbonate
  • Acrylic
  • +50 specialty resins
  • Class A – color-matched
  • Graining
  • Foaming agents