Insultherm braided fiberglass sleeving’s advanced technology in a convenient slip-on boot sleeve is designed specifically to protect spark plug wires from extreme engine heat.
These 3/4" diameter sleeves feature a double-thick wall (triple thickness at the sewn end) for maximum heat resistance where it matters most at the plug boot. Simply slide the sleeve over any spark plug wire and boot, including right-angle designs, to safeguard them from temperatures exceeding 1,200°F (649°C).
- Exceptional Heat Resistance: Withstands continuous exposure to extreme engine temperatures, even in direct contact with hot exhaust headers.
- Durable Fiberglass Construction: Engineered from high-temperature braided fiberglass for long-term reliability.
- Non-Conductive & Flame Resistant: Will not support combustion and resists all automotive fluids and chemicals.
- Easy Installation: Slip-on design fits snugly over existing spark plug wires and boots — no clearance required.
- Extended Wire Life: Protects costly spark plug cables from heat damage, ensuring consistent performance.
Melt Point (ASTM D-2117): 2,048°F / 1,120°C
Maximum Continuous: 1,202°F / 650°C
Minimum Continuous: -94°F / -70°C
Cutting: Pre-Cut