HD Hook and Loop Thermaflect Sleeve

wire protection with hook and loop closure

American Made Since 1985

HD Hook and Loop Thermaflect Sleeve

Heavy-Duty Radiant Heat Sleeve with Hook & Loop.

Heat shield sleeves can assist heavy equipment and factories by shielding components from heat damage and can even help lower emissions by increasing fuel efficiency.

Reflects up to 90% of radiant heat (ASTM F1939 & Mil-C-24929A)
Should NOT come in direct contact with heat source (needs an air gap)
Flexible, bends and conforms to almost any shape
Helps to shield fluids, lower IAT’s, protects harnesses
Hook and loop seam allows installation without component assembly
OEM and custom manufacturing available
Made in the USA

1100°F

593 °C

Continuous

2000°F

1093 °C

Intermittent

TDS

Product Types

HD28011

1/2 in id x 10 ft

HD28012

1/2 in id x 25 ft

HD28021

3/4 in id x 10 ft

HD28022

3/4 in id x 25 ft

HD28101

1 in id x 10 ft

HD28102

1 in id x 25 ft

HD28151

1-1/2 in id x 10 ft

HD28152

1-1/2 in id x 25 ft

HD28201

2 in id x 10 ft

HD28202

2 in id x 25 ft

HD28251

2-1/2 in id x 10 ft

HD28252

2-1/2 in id x 25 ft

HD28301

3 in id x 10 ft

HD28302

3 in id x 25 ft

HD28351

3-1/2 in x 10 ft

HD28352

3-1/2 in id x 25 ft

HD28401

4 in id x 10 ft

HD28402

4 in id x 25 ft

HD28451

4-1/2 in id x 10 ft

HD28452

4-1/2 in id x 25 ft

HD28501

5 in id x 10 ft

HD28502

5 in id x 25 ft

Industrial-Grade Radiant Heat Protection That Installs in Minutes

Protect your critical wiring, fuel lines, and hoses from damaging heat without disassembling a thing. The Thermaflect Hook & Loop Seam Heat Sleeve is a rugged, high-performance thermal barrier engineered for heavy-duty equipment and transportation applications. Designed with an easy-to-use hook-and-loop closure, it installs quickly over existing lines—no need to disconnect or reroute components. Keep High Temperature hook and loop away from heat source.

Capable of reflecting up to 90% of radiant heat (with at least 1″ of airspace and good airflow), this industrial insulation sleeve helps maintain safe operating temperatures around sensitive systems. It keeps fuel and air intake temps cooler, helping to prevent vapor lock, reduce fuel evaporation, and improve overall efficiency and reliability—especially under heavy loads and long operating hours.

Thermaflect Sleeve withstands 1100°F continuous radiant heat and up to 500°F of direct contact, making it ideal for fuel lines, wiring harnesses, air intakes, intercooler piping, and A/C hoses. Also available in a sewn seam configuration for permanent or OEM production use, it’s a trusted solution for reducing downtime, increasing component life, and boosting system performance in harsh environments.

FAQ

What do ASTM F1939 and Mil-C-24929A mean?

ASTM F1939 is a standardized test method for measuring the radiant heat resistance of materials, simulating high-temperature conditions. Mil-C-24929A is a military specification that outlines performance criteria for protective sleeving used in aircraft and military vehicles. These certifications ensure the sleeve meets rigorous standards for thermal protection and durability.