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High-Voltage Spark Plug Cap




Jotex Rubber Corp. manufactures high-quality custom silicon rubber spark plug caps and custom rubber stoppers for applications where off-the-shelf catalog products don't work. These superb caps are top of the range. High-quality special rubber liners on both ends prevent moisture from causing electrical leakage.

We can custom-compound rubber material for resistance to heat, chemicals, high voltage or virtually any environment.


  1. Rubber material: Silicone

  2. Outer color black, inner color transparent

  3. Electric conduction in the outer layer, electric insulation in the inner layer

  4. Voltage withstand: ≥ 25kV

  5. Good heat resistance, good fuel resistance, and good aging resistance


High-Voltage Spark Plug Caps are used for:

  1. Contact prevention (electrical and high-voltage contacts are covered)

  2. Protection against mechanical damage

  3. Protection against oxidation

  4. Protection against corrosion


None of the parts pictured are in stock or for sale. These are all examples of custom-manufactured products that illustrate Jotex Rubber Corp.'s capabilities.


The contents of this specification can change per your own specific requirements. We design and manufacture custom shapes and develop specialty materials to deliver a performance advantage. Request for quotation now!

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