Design Engineering Heat Sheath Aluminized Sleeving 3/4" I.D. x 3 ft — Reflective Thermal Shield, 500°F Contact Rating

Design Engineering Heat Sheath™ Aluminized Sleeving is a heavy-duty, slip-on thermal shield that reflects radiant heat and protects hoses, wires, and fluid lines from abrasion, oil, and chemicals.

Built for automotive and industrial environments where high temperatures and rough conditions shorten the life of hoses and wiring, this sleeving combines a 19 oz high-temperature fiberglass core with a tough aluminized outer layer. The construction reflects radiant heat up to 2000°F while tolerating direct contact temperatures up to 500°F, and aramid-reinforced stitching improves resistance to chafing and wear. The product is straightforward to fit over existing lines and is made in the USA. Note: do not install directly on exhaust components.

How does the Heat Sheath reduce heat transfer to hoses and wiring?

The aluminized outer surface reflects radiant heat away from covered components, while the dense fiberglass insulation slows conductive heat transfer. That combination keeps the line surface noticeably cooler under heat exposure without adding excessive bulk.

• Reflects radiant heat up to 2000°F to reduce thermal load
• 19 oz high-temperature fiberglass insulation for low conductivity
• Withstands direct heat up to 500°F for short-term contact

Will this sleeving stand up to abrasion, oil, and chemicals?

Yes—Heat Sheath is engineered to resist mechanical wear and common automotive fluids. The aramid fiber-reinforced thread and aluminum outer film protect lines from rubbing, road debris, oil, fuel, and grease that otherwise cause premature failure.

• Aramid-reinforced stitching enhances tear and abrasion resistance
• Aluminized outer layer sheds oil, dirt, and grease for cleaner surfaces
• Durable fiberglass core holds shape under mechanical stress

How easy is installation and what sizes are available?

Installation is simple: disconnect the hose or line if necessary, cut the sleeving to length, slide it over the component, and reattach—no special tools required. The listed product is 3/4" I.D. and shipped in a 3-foot length, suitable for many plumbing, vacuum, fuel, and wiring applications.

• Slip-on design for quick retrofit or repair jobs
• Cut-to-length flexibility for custom applications
• 3/4" inner diameter, 3 ft length—trim to fit your run

Is this safe for engine bay and industrial use?

Heat Sheath is designed for demanding engine bay and industrial environments, offering flame-retardant construction and resistance to common contaminants. However, it is not meant to be mounted directly against exhaust manifolds, turbo housings, or other components intended to be in continuous direct contact at extremely high temperatures.

• Flame-retardant fiberglass and aluminized outer layer for safety
• Made in the USA to industrial quality standards
• Not for direct exhaust-contact installations—maintain clearance

Who is this for: technicians, fabricators, tuners, restoration shops, and DIY mechanics who need a reliable, easy-to-install thermal barrier for hoses, fuel and brake lines, and wiring harnesses. If you service vehicles or equipment exposed to radiant heat, oil, and road debris and want a durable protective sleeve that balances thermal performance and abrasion resistance, Design Engineering Heat Sheath™ is built for those applications.