About True North Molds

True North Molds is a leader in the design and manufacture of molds for the Automotive TPE and Rubber Sealing Systems market. Starting in the 1970’s True North Molds has developed its skill and expertise in this niche market concentrating on sealing system molds . TPE is now a significant part of our business with many projects in North America and Europe.

We design and build molds from small Butt Splices right up to the large Glass Encapsulation molds. Innovation and new technology keep us at the forefront of this demanding industry. We also design and build extrusion cutting units and stretch benders. We have been involved in programs for all the Major car companies including General Motors, Ford, Chrysler, Toyota, Nissan, Honda, Mercedes, BMW, Volkswagen, Isuzu, Bentley, Skoda, Subaru, Seat and Smart.

True North Molds also manufacturers plastic injection molds up to 750 ton press size for the automotive and consumer markets. TNM has vast experience with Interior, Exterior, Under-hood, Safety System and Seating components and can design and manufacture prototype, single and multi-cavity pre-hardened and hardened molds for horizontal presses and shuttle (over)molds for vertical presses.

True North Molds has partners in North America and China to help meet our customers' global requirements for on-time quality molds at a reasonable cost. We can offer expertise in many areas: part design; mold design; special finishing of mold surfaces to achieve gloss match on molded parts; tuning and first run sample parts; cutting units and low volume part production. We take pride in assisting our customers to produce quality parts for their customers with a minimum of issues.

Precision Machining

True North Molds is continually updating its machinery, we have state of the art CNC high speed 5 axis machining centers with pallet changers. Combined with our experienced work force these machines are the backbone of our high quality molds. Our skilled mold makers add to this with their expert fitting and assembly skills, producing a quality product to demanding schedules at a reasonable cost. Combined with our expert design department this enables us to maintain our position as a Global Sealing System Mold Supplier.

Production molds

TNM has been building CNC machined Sealing System molds for the Automotive TPE and EPDM sealing industry since the 1980s. Molds can be designed and built with or without automation to suit our clients needs. We listen to our clients requests for special features and options and incorporate these into the design of our molds.

We are a major supplier of Sealing System molds to the North American and European Sealing System industry.


Sealing system molds

Extrusion processing

  • Cutting
  • Notching
  • Bending

Prototype assemblies

  • Supply extrusion and we cut/notch/bend
  • Design and build mold
  • Mold parts

Plastic injection molds

  • Up to 750 ton press capablility
  • Prototype, single and multi-cavity
  • Horizontal and vertical shuttle molds

Custom services

  • 5 axis machining
  • Wire EDM
  • Laser welding
  • 3D printing
  • Short run rubber and plastic part molding