Thermal Block™ - Heat Shield

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How Much Thermal Block Do I Need?

Vehicle Class

Call us to discuss your project. 1-800-679-8511

Vehicle Coverage

Estimated Square Footage

0Sq Ft
How do I get exact square footage?
  1. Get a tape measurer
  2. Measure the length and width of each surface
  3. Length x Width = Square Footage

Thermal Block™ - Heat Shield

Does your newly restored vehicle send heat through the firewall and floorboards once the engine gets going? Keep engine and exhaust heat away from the vehicle’s cabin with an OEM approved heat shield. Thermal Block™ strips are very flexible and can withstand up to 800*F. Composed of highly reflective foil and insulating PET fibers, just face the foil side towards any heat source to redirect radiant heat and substantially reduce heat transfer.


*The "No Fold", 4 sheet, and 10 sheet options ship flat in a 12" x 24" box. The "Folded" option is delivered folded over inside of a mailer.



  • Highly reflective aluminum surface designed to face a heat source (choose between smooth or knurled finish)
  • Each heat shield is 1/8” thick and 12” x 24” (2 Sq Ft)
  • Reflects 98% of radiant heat
  • Withstands up to 800°F
  • Treated for water, solvent, mildew, gas/oil, coolant, engine fluid, and flame resistance
  • Made in the USA




 Dimensions   12” x 24”
 Thickness   1/8"
 Weight  0.35 lbs per sheet 
 Temperature Rating   800°F 




 Product Sheet   Thermal Block™ Product Sheet 



Material Testing

 Tested Properties   Testing Method   Performance 
 Impact Resistance (Chipping)   SAE J400 (Gravelometer)   Pass 
 Flammability   FMVSS302   Pass



Installation Instructions

  • Thermal Block™ comes with a peel and stick backing. To install Thermal Block™, simply peel and stick!
  • Install locations
    • Firewall - engine side
    • Hood - entire lid
    • Back seat wall - for cars with engines in the back
    • Air intake box
    • Should be applied anywhere there is a heat source, facing the heat, with a 2" air gap.



Common Product Uses

  • Quick fix for automotive thermal hot spots such as the fuel tank, fuel line, brake line, spare tire, and underbody heat shields. It's also commonly used as a firewall heat shield.
  • Always face Thermal Block™’s aluminum side towards the heat source. This product will not be effective inside your car’s cabin.
  • Allow space for air flow. At least 2 inches is required, but more airflow will improve your heat control.
  • Thermal Block can be installed on top of Damplifier Pro™ vibration dampening mats.
  • Make sure you prepare the surface to remove oils, dirt, dust, and grease. Just peel and stick. We recommend an outside temperature of at least at 65 F to ensure adhesive works properly.
  • For thermal insulation with more sound absorbing properties, consider our Heat Wave Pro™ - Jute Thermal Insulation or Mega Block™ - Hydrophobic Foam Heat Shield.