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Compression Molding

Compression molding is a method of producing curved or intricate rubber parts. It involves placing a material inside a steel cavity and then applying pressure until the part cures to the desired shape. Two plates are brought together in this process, and the pressure inside the cavity compresses the rubber and molds it. The shape and size of the molding cavity determines the form and shape that the rubber will take on. After curing, excess material is removed and then parts are deflashed.

Advantages of Compression Molding

  • Lower cost than other methods
  • Mass production/high quantity runs
  • Minimal amounts of material wasted
  • Parts can vary in size
  • Multiple materials and durometers can be utilized
  • Multiple cavities to increase efficiency


  • Gaskets
  • O-rings
  • Cushioning pads
  • 3D parts
  • Buttons

NEDC Sealing Solutions has the ability to custom mold silicone, EPDM, Neoprene®, Fluoroelastomer, Nitrile, SBR, Fluorosilicone, and Viton®.

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All of the information presented above is believed to be factual and accurate; however, NEDC is not liable for any design or application utilizing this information.

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