HD Velcro Thermaflect Sleeve

HD Velcro Thermaflect Sleeve

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  • Continuous operating reflective temperature of 1100°F, 2000°F intermittent

  • Capable of reducing up to 90% of radiant heat

  • Helps to prevent vapor lock, lower air intake temperatures, protects wires from melting

  • Hook and loop seam allows installation without component assembly

  • WARNING: Cancer and Reproductive harm - www.P65Warnings.ca.gov

  • Made in the USA

Part No Description
274013 1/2 id x 10 ft Velcro seam
274035 3/4 id x 10 ft Velcro seam
274101 1-in id x 10 ft Velcro seam
274112 1-1/2 id x 3 ft Velcro seam
274201 2-in id x 10 ft Velcro seam
274212 2-1/2 id x 3 ft Velcro seam
274301 3-in id x 10 ft Velcro seam
274305 3-1/2 id x 10 ft Velcro seam
274309 4-in id x 10 ft Velcro seam
274311 4-1/2 id x 10 ft Velcro seam
274313 5-in id x 10 ft Velcro seam
274315 5-1/4 id x 10 ft Velcro seam

Shield radiant heat away from your heavy duty wiring, lines, and cables safe from heat, without disassembling them. Thermaflect Velcro Heat Sleeve acts as a thermal barrier capable of reflecting up to 95% of radiant heat away (requires minimum of 1" of airspace and airflow). It is ideal to be used to use on your fuel lines, wiring looms, air intake, intercooler pipes, and air conditioner hoses. By keeping fuel and air intake temperatures cool it helps to prevent vapor lock, improves performance, improves mileage and also reduces fuel evaporation and vapor lock. Thermaflect Sleeve withstands 1100°F of continuous radiant heat and 500°F direct heat. Radiant barrier insulation is also available in sewn seam.

Prop 65 Warning:
CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov



  • Face velcro seam in opposite direction of heat source
  • Be sure ends of sleeve are sealed or secured to component you are trying to protect. You can seal the ends using our Thermaflect Tape, Cool Foil Tape, Thermal-Tie, shrink tube, or any mechanical fastener. Securing the ends will ensure no hot air sneaks in behind the sleeve, thus allowing it to work more efficiently.
  • It also functions better if the heat shield sleeve is tight on the component

MSDS | Specification Sheet | Brochure | Brochure (printer friendly)

Insulation type: Thermal Barrier, designed to shield radiant heat

Base material: Fiberglass

Color: Silver/Chrome



The following conversion is a guide for AN hoses only. The conversion reflects the most common conversions for AN hose sizes, however there may be some variances with different manufacturer's. Always double check by measuring the OD of your hose. Always verify the OD of your hose, you may use a caliper or sliding an open end wrench over the hose. If you are still unsure verify with the manufacturer of the hose as to their specific OD. By using this calculator you acknowledge this is a guide only and it is ultimately your responsibility to verify the correct OD of your AN line.








Use HD Thermaflect Sleeve on:

  • Intercooler pipes
  • Wire looms
  • Hydraulic lines

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