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Reflective White Foam Thermal Insulation Heat Shield Windows Size 2ft x 5ft

Reflective White Foam Thermal Insulation Heat Shield Windows Size 2ft x 5ft

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$12.88at AmazonObserved at 3:43 PM

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Our take on the Reflective White Foam Thermal Insulation Heat Shield Windows Size 2ft x 5ft

This is a 2 ft by 5 ft roll of reflective white foam insulation, 1/4 inch thick, with a foil face that reflects up to 97% of radiant heat. It is a Class 1 / Class A fire-rated sheet, so it can go in garages, sheds and around windows where bare foam would not pass. At $12.88 at Amazon as of November 4, 2026, it is a low-cost single roll; the price is the only new price tracked, so there is no recent range to compare it against.

Best forGarage doors and shed wallsWindow and attic heat shieldingRadiator or pipe backingCheap DIY projects that need a fire-rated sheet
Pros
  • Reflects up to 97% of radiant heat
  • Class 1 / Class A fire rating
  • 1/4 inch thick and easy to cut with scissors
  • Light and simple to staple or glue up
  • Low price for a 10 sq ft roll
Cons
  • Only 10 sq ft per roll, so large jobs need several
  • Thin foam adds little R-value on its own
  • Foil face tears and creases easily
  • Not a substitute for bulk insulation in a heated room

Reflective White Foam Thermal Insulation Heat Shield Windows Size 2ft x 5ft prices at every store

  • AmazonNew

    Availability unknown

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    $12.88+ $4.99 shippingObserved at 3:43 PM
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Reflective White Foam Thermal Insulation Heat Shield Windows Size 2ft x 5ft price history

Lowest price we've seen: $12.88 on Nov 4 at Amazon. Tracked across 1 store since Nov 4.

Specifications

Width
24 InchesSource
Length
5 feetSource
Thickness
1/4inchSource
Radiant heat reflection
97%Source
Heat emission
less than 3%Source
Fire rating
Class 1 / Class ASource

Questions and answers

Is this worth it for a garage door?
Yes, for radiant heat only. One 2 ft by 5 ft roll covers a small section, so a standard two-car door needs several rolls. It blocks sun heat from radiating in but adds little R-value.
What is the R-value of 1/4 inch foam?
Roughly R-1. The foil does the work by reflecting radiant heat, not by slowing conduction. Treat it as a radiant barrier, not as wall insulation.
Can it go behind a radiator or near a stove?
It is Class 1 / Class A fire rated, which helps, but keep it off direct flame and hot metal. Check local code before using it near a stove or flue.
How do I install it?
Cut it with scissors or a utility knife and fasten with staples, foil tape or construction adhesive. Foil tape on the seams keeps the reflective face continuous.
Is $12.88 a good price?
It is a low price for a 10 sq ft fire-rated roll, and Amazon is the only new price tracked as of November 4, 2026. Compare per square foot if you need more than one roll.
Where is the Reflective White Foam Thermal Insulation Heat Shield Windows Size 2ft x 5ft cheapest?
At Amazon, for $12.88, as of our latest check.

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