EMI Shielding

EMI is electromagnetic interference, also known as radio-frequency interference (RFI) and is caused by an external source that affects the operation of electrical circuits, devices, and systems. EMI shields are designed to protect these circuits and systems from electromagnetic induction, electrostatic coupling, or conduction. These causes of EMI include synthetic, and natural sources and can result either in temporary loss of function to systems or permanent damage and in extreme cases to loss of life.

Modern-day EMI shields include flexible metal screens, wire, and forms that incorporate metal particles coated in silicone rubber for solving sealing and insulation requirements. Where these materials are used in electronic devices, they also protect from mechanical shock and external elements of the operating environment while maintaining electrical conductivity. These generally take the form of EMI shielding gaskets and seals that can be die-cut, water jet cut, or compression molded.

Jefferson Rubber Works produces high-quality precision EMI RFI shielding gaskets and seals for a variety of industries and applications that meet client specifications and function effectively in the required application.

Applications for EMI Shielding

  • Computers
  • Data cabling
  • Sensitive instruments
  • Wiring harnesses
  • Mobile phones
  • Radios and television appliances


  • Aerospace
  • Transportation
  • Power transmission
  • Medical equipment
  • Military
  • Computer and information technology
  • Navigation
  • Automotive
  • Electronic consumer goods

Features and Benefits of EMI Shielding

  • Protection from EMI/RFI
  • Shock absorption
  • Aging and weather resistant
  • Chemical resistant
  • Data protection