1/2in x 12' Thermo Sleeve

The THERMO-TEC 1/2in x 12' Thermo Sleeve is a high-temperature hose and wire protection system designed for demanding engine compartment and exhaust system applications. This 12-foot sleeve features an aluminized fiberglass construction that reflects radiant heat while protecting sensitive hoses, wiring, and fuel lines from extreme temperatures encountered in automotive, motorsport, and industrial settings.

The 1/2-inch inner diameter accommodates standard hose and wire bundles, while the aluminized outer layer provides superior thermal reflectance and corrosion resistance. The fiberglass material maintains flexibility for routing around engine components and maintains integrity at sustained high temperatures. At 0.41 lbs for the complete 12-foot length, the sleeve adds minimal weight while delivering proven heat shielding performance in professional engine bays where temperature management is critical to component longevity and safety.

This product serves engine builders, automotive technicians, drag racing teams, and hot rod fabricators who require reliable thermal protection for fuel injection lines, brake lines, electrical harnesses, and coolant hoses. The extended 12-foot length supports complete routing from engine block to firewall or fuel tank, reducing the need for multiple sleeves. The aluminized fiberglass construction resists oils, coolants, and fuel exposure while maintaining flexibility during installation and vibration cycles—essential for motorsports and high-performance street applications.

Heat sleeve protection is standard practice in competition automotive environments and modern performance engine builds where underhood temperatures routinely exceed 200°F. The THERMO-TEC brand has established market presence as a thermal management solution trusted across racing, custom fabrication, and restoration sectors where proper hose and wiring protection directly impacts reliability and safety margins.