Meet market specifications for demanding spark plug boot applications

With proven Silastic® 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 Provide electrical protection and insulation   Manufacture spark plug boots that: Withstand high temperatures Electrically insulate and protect   Learn More Improve temperature resistance   Manufacture spark plug boots that: Maintain physical properties when exposed to continuous high temperatures  Accommodate wide variations in temperature extremes   Learn More 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. Take advantage of our compounding expertise We can tailor or custom compound silicone elastomers to meet your exact spark plug boot requirements.   Learn about your custom compounding and technical support options. Tell us what you need.

Ask an expert which silicone elastomers are right for your spark plug boot application.