Design Engineering Heat Sheath aluminized heat-sleeving 1-1/4" I.D. x 3 ft — reflective, fire-resistant protection

Design Engineering Heat Sheath is a slip-on aluminized sleeving that reflects extreme radiant heat and protects hoses, cables, and fluid lines from abrasion, oil, and chemicals.

Built for demanding automotive and industrial environments, this sleeving combines a 19 oz high-temperature fiberglass insulation core with a durable aluminized outer layer and aramid-reinforced stitching. The result is a flexible, fire-resistant jacket that reflects radiant heat up to 2000°F and endures direct contact temperatures to 500°F while keeping routed lines shielded from wear, grease, and road debris. Its simple slip-on design makes retrofit and repair work fast without specialty tools. Made in the USA, Heat Sheath is intended to protect components from heat sources—do not wrap directly onto exhaust manifolds or pipes.

How does Heat Sheath keep hoses and wires cooler under high heat?

Heat Sheath combines reflective and insulative layers to reduce heat transfer by reflecting radiant energy and slowing conductive heat. That keeps the temperature at the hose or cable surface lower, extending life and reducing heat-related failures.

• Aluminized outer layer reflects radiant heat up to 2000°F.
• 19 oz high-temp fiberglass core provides thermal insulation.
• Withstands direct heat exposure up to 500°F without degrading.

Will this sleeving resist abrasion, oil, and chemicals in engine bays?

Yes—Heat Sheath’s construction is selected for durability in harsh environments. The aluminized surface sheds oil and grime while the fiberglass core and aramid thread resist chafing and tearing from vibration and contact.

• Aramid-reinforced stitching increases abrasion resistance.
• Outer layer repels oil, fuel, grease, and common chemicals.
• Durable against road debris and mechanical wear in tight spaces.

How easy is installation for repairs or aftermarket routing?

Installation is straightforward: disconnect or free the line, cut the sleeving to length, slip it over the component, and re-install. No heat-shrinking or adhesives are required, making it ideal for field repairs and DIY upgrades.

• Slip-on design requires only cutting tools and basic reassembly.
• Available in flexible lengths—this listing is 3 ft at 1-1/4" I.D.
• Can be trimmed to size for custom runs and branch splits.

What limitations or precautions should I know before using it?

Heat Sheath is designed to protect lines from adjacent high-temperature sources but should not contact exhaust components directly. Allow adequate clearance and avoid wrapping the sleeving tightly around surfaces that exceed rated temperatures.

• Do not apply directly to exhaust pipes or manifolds.
• Maintain recommended clearance from continuous high-heat sources.
• Inspect periodically for contamination or mechanical damage.

Who is this for: Design Engineering Heat Sheath is aimed at mechanics, race teams, custom fabricators, fleet maintenance crews, and DIY enthusiasts who need a robust, easy-to-install thermal and abrasion barrier for hoses, wiring looms, and fluid lines. It’s ideal where radiant heat and rough service shorten component life and where a field-serviceable, American-made solution is preferred.