FBN0.75BK - Insultherm® Spark Plug Boot - 4 1/2" - Black

Techflex® Insultherm® Spark Plug Boots

For decades, Techflex®’s Insultherm® braided fiberglass sleeving has been the first choice among automotive professionals and enthusiasts alike for many of their thermal protection applications. These innovative sleeves offer the same high temperature protection in an easy slip on sleeve that will extend the life of expensive spark plug wires by protecting them where they need it most... at the boot. Just slip these 3/4” diameter double thickness (triple thick at the sewn end) sleeves over any spark plug cable and boot (even right angle boots) to protect them from engine temperatures up to 1,200°F. Once installed, the sleeves require no clearance from hot surfaces, and can even rest directly on hot exhaust headers without affecting performance. Insultherm Spark Plug Boot Sleeves are completely non-conductive, resist all engine chemicals, will not support combustion, and provide an easy, economical solution to the challenge of wire protection in the cramped, high temperature environment of any high performance engine compartment.

LENGTHS: 4.5", 7.5", and 12"

OPERATING TEMPS: -94° to 1,202°F (-70° to 650°C.)

MELT TEMP: 2048 ºF / 1120 ºC

COLOR OPTIONS: Black, Natural, Red, & Blue

SLEEVING CATEGORY: High Temperature

Why Do I Need High Temperature Sleeving?

There are many applications where high temperature braided sleeving is essential, such as in aerospace, automotive, industrial, and military settings. In these environments, wires and cables may be subjected to intense heat from engines, exhaust systems, or other high-temperature sources. Without proper insulation and protection, these components can become damaged or even fail, leading to system downtime, safety hazards, and costly repairs.

Tips for Installing & Terminating Braided Sleeving

How To Determine What Diameter Sleeving You Need

Bundle the cords that you’ll be covering and measure the diameter of the bundle. If you want a snug fit, choose a braided sleeving option with a slightly smaller diameter than that of your cables. If you want a loose and flexible fit, choose a braided sleeving option with a diameter that is equal to or slightly larger than that of your cables. Keep in mind that braided sleeving loses 2% to 3% of its length when it expands. Be sure to plan accordingly!

How To Terminate Sleeving with Heatshrink Tubing

Heatshrink Tubing is the ideal way to create a tight, professional finish on any wire, hose or cable management project. Once shrunk, the tubing will hold its reduced state, even at elevated temperatures. This application can be used to protect, color code, brand, or secure ends or sections of braided sleeving. A Heat Gun is required to properly apply heatshrink tubing. You can find a guide to the proper technique for working with heatshrink tubing Here.

About The Insultherm® Family of Products

Insultherm® products are extremely high temperature resistant material commonly used as thermal protection for wires, cables and hoses that are subjected to continuous and extreme high temperature environments, such as engine manifolds and exhaust systems.

Insultherm®:This traditional sleeving is tough and durable, maintaining its tight structure under extreme vibration, abrasion, mechanical stress, and temperature variations.

Insultherm® Heavy Duty: This is a braided fiberglass sleeving made in a heavy wall construction with a high temp cord braided into the sleeving. Insultherm® HD is saturated with high temperature acrylic resins which adds rigidity and reduces fray when cut.

Insultherm® Tru-Fit: Tru-Fit is often used as primary insulation on low voltage applications such as leads in toasters, coffee makers, ranges, and other appliances. This product is available in a wider range of colors than standard Insultherm®.

Insultherm® Ultra Flex®: Ultra Flex® expands slightly, allowing it to slide easily over wires and follow curves and contours without binding. It is compatible with most bonding & saturation systems.

Insultherm® Ultra Flex® Pro: Ultra Flex® Pro cuts easily with scissors, and special heat treated construction minimizes fraying and dusting during assembly. The Increased wall thickness adds value to insulation.

Insultherm® Spark Plug Boots: These innovative sleeves offers high temperature protection in an easy slip on sleeve that will extend the life of expensive spark plug wires by protecting them where they need it most... at the boot. Just slip these 3/4” diameter double thickness (triple thick at the sewn end) sleeves over any spark plug cable and boot (even right angle boots) to protect them from engine temperatures up to 1,200°F.

Insultherm® Header Wrap: Insultherm® Header Wrap is an extremely high temperature resistant wrap commonly used to contain and manage hot gases in automotive and high performance headers and exhausts.

Insultherm® Header Wrap SI: This exhaust wrap is made from texturized amorphous silica filament yarn woven into a strong and flexible form. Because the yarn is texturized into a bulky form it provides excellent insulating values. Header Wrap SI is not made from leached fiberglass, resulting in a much more wear resistant finished product

Techflex® Sleeving Categories & What They Mean

GENERAL PURPOSE: Suggested for general wire management, bundling, identification and protection applications in home, office, commercial and industrial environments.
HEAVY DUTY: Ideal for use in applications where protection from abrasion damage is a primary concern. These products are built to withstand rugged, challenging environments.
METAL & SHIELDING: Products that not only provide protection and management for wires and cables, but also offer EMI, RFI and ESD protection in a wide range of vulnerable applications.
ADVANCED ENGINEERING: Engineered from specialized polymers, designed to exacting specifications and manufactured to tight tolerances, these premium products are in use in many aerospace, military and biomedical applications.
HIGH TEMPERATURE: Designed for protection in high temperature environments where failure would be catastrophic, these products are state of the art in high temperature material engineering.
SPECIALTY: Highly engineered, application specific products to fulfill our customer's individual and unique product specifications.
ELECTRICAL: Coated fiberglass sleeving options engineered to provide a range of insulation options with up to 15,000volt protection.