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Silicones from Dow Corning
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Automotive Spark Plug Boot Solutions

High-temperature resistance, Dielectric insulation, Manufacturing options, Consistent, high quality.

Fabricate spark plug boots with high-temperature resistance and consistent high quality. Provide dielectric insulation and gain manufacturing flexibility with Silastic silicone rubber for spark plug boots.


Meet market specifications for demanding spark plug boot applications

With proven XIAMETER® brand silicone high-consistency rubber (HCR) and liquid silicone rubber (LSR) elastomers, you can fabricate spark plug boots that:

  • Meet market demand for long-lasting, low-maintenance components
  • Provide critical dielectric (electrical insulating) protection required for automotive high-voltage cables, even in tight clearances against engine block
  • Maintain physical and dielectric properties over wide temperature ranges from -40 to 200ºC (-40 to 392ºF)
  • Provide long-term heat resistance
  • Withstand oil contact that would degrade organic materials

Gain manufacturing productivity

Learn from our fabrication experts how you can:  

  • Mold complex shapes to meet precise specifications and tolerances
  • Utilize LSRs for maximum process efficiency
  • Improve productivity with overmolding techniques
  • Achieve better-quality consistency

Create products that meet your customers' needs


Manufacture spark plug boots that:

  • Withstand high temperatures
  • Electrically insulate and protect


Manufacture spark plug boots that:

  • Maintain physical properties when exposed to continuous high temperatures 
  • Accommodate wide variations in temperature extremes

Specify the right elastomer

For engine ignition insulation and spark plug boots, we recommend a high consistency rubber (HCR) elastomer with a durometer between 40 and 70 Shore A, which can withstand temperatures as high as 316º C (600º F) and is able to be easily molded in compression, transfer, or injection molding machines.

Get exactly what you need

XIAMETER silicone rubber products can be tailored to specific performance and application requirements.

Learn more about the money-, time- and labor-saving benefits of customized silicone elastomers from Dow Corning.

Request a Customized Elastomer

Choose XIAMETER® brand silicone rubber

XIAMETER® silicone rubber products are manufactured by Dow Corning to the same quality and performance standards as our other globally known and trusted silicone elastomers.

Sold in the most cost-effective way possible – online and through knowledgeable Dow Corning distributors – XIAMETER® brand helps you stay cost competitive in challenging economic times with:

Learn more about the benefits of buying XIAMETER® brand at

Explore products
Find and compare silicone elastomers for your application.
Tell us what you need
Request a Customized Elastomer

Better than organics

Silicone's unique properties make it the material of choice in automotive applications.

Ask a question
If you do not find the answer to your silicone rubber material or fabricating question on our website, please contact us.

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