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M-Cor Inc. is a privately held corporation founded in 1987. We specialize in manufacturing high performance Teflon® encapsulated o-rings, close tolerance [ +/- .001] Viton® rubber extrusions and engineered o-rings for medical, semiconductor and chemical processing industries. M-Cor was founded in 1987, our committment to incremental improvement is the basis for our success over the years.

Time LIne of Incremental Improvements:

  • In 1992, M-Cor expanded its manufacturing operation to pictureresque, Helena, Montana, increasing its production capabilities and manufacturing facility. 
  • In 2008, M-Cor recognized a need for custom extrusion of close tolerance FKM and Silicone elastomers to  meet our customers needs. With the inclusion of extrusion capabilities, our competitive position increased within the industry.
  • In 2013, M-Cor added full CNC machining capabilities to meet the requirements of client requests to engineer “out of the box” solutions for specialized applications.
  • In 2019, M-Cor recognized the need for quality inspection systems that guaranteed client satisfaction. So, our engineers developed  automated vision inspection to eliminate human error and increase quality output and increasing output.
  • In 2020 M-Cor clients requested methods to accurately measure amd document part dimensions for critical applications. Meeting those needs, we invested in VCMM technology. This technology enables us to confirm our dimension quality claims.

M-Cor’s products are utilized in the chemical, semiconductor, pharmaceutical, biological and medical industry sectors.

 M-Cor offers a range of FEP and PFA encapsulated products, including:

  • Encapsulated o-rings: silicone, FKM and EPDM cores
  • Encapsulated cam lock gaskets
  • Micro encapsulated o-rings
  • Various encapsulated geometries
  • Precision extrusions in silicone, FKM or EPDM

M-Cor’s team of experienced engineers can help you design the right product for your application.

If you are searching for a quality experienced manufacturer of encapsulated o-rings and extruded products, your best choice is M-Cor Inc. ,since 1987.