Does this replace fiberglass insulation?

No. It is a radiant barrier with a thin foam core, so it blocks radiant heat but adds little conductive R-value. Use it alongside bulk insulation or as a window and garage-door cover.

Cut it with a utility knife or scissors, then staple, nail, glue or spray-adhere it in place. Leave an air gap between the reflective face and the surface for the barrier to work.

Is it safe to handle?

Yes. It is fiber-free and non-toxic, so no gloves or respirator are needed. It is Class A fire rated to ASTM E84.

Will it stop condensation and mold?

It is not affected by moisture and does not promote mold, mildew or pests. Covering cold glass with it reduces condensation on window panes.

What size is the roll?

The roll is 24 inches wide by 10 feet long, with a 5 mm closed-cell foam core between two reflective faces.

Can I use it in walls and ceilings?

Yes, and it also dampens some sound when used in walls, ceilings and floors. It does not compress or collapse behind finishes.

Where can I buy the Reflective 5MM Foam Core Window Insulation Roll?

2 stores we checked sell it, including Walmart, Amazon.

Reflective 5MM FOAM CORE Window Insulation Roll, 24in x 10ft

Reflective 5MM Foam Core Window Insulation Roll

Q: Where is the Reflective 5MM Foam Core Window Insulation Roll cheapest?

At Amazon, for $15.99, as of our latest check.

Best price now

$15.99at AmazonChecked Nov 12

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What reviewers say

Owners use it mostly for windows, garage doors and attic spaces and report noticeably warmer rooms and less condensation. They like that it cuts cleanly and installs without fiberglass dust. Some find the thin foam does little unless a dead-air gap is left behind it.

What people mention

InstallationPraisedOwners say it cuts with scissors or a knife and staples up quickly without tearing.
Fiber-free handlingPraisedBuyers like that there is no itch, dust or respirator needed, unlike fiberglass.
Draft reductionPraisedUsers report warmer rooms and less window condensation after covering glass and doors.
Insulation valueCriticisedReviewers note the thin foam adds little R-value and works mainly as a radiant barrier.
Air gapMixedSome say the reflective face only helps when a dead-air space is left behind it.
DurabilityMixedA few report edges and seams lifting where they were not taped down.

About the Reflective 5MM Foam Core Window Insulation Roll

This is a double-sided reflective radiant barrier with a closed-cell foam core. It comes as a roll measuring 24 inches by 10 feet, with a 5 mm foam core. The core does not compress, collapse or disintegrate, and it is light but durable enough to hold staples without tearing.

The surface reflects 97% of radiant heat and emits less than 3%. It is a fiber-free, non-toxic, non-carcinogenic material that can be handled and installed without protective clothing or a respirator. It is not affected by moisture or humidity, inhibits condensation, and does not promote the growth of fungi, mold or mildew. It also does not promote nesting of insects or rodents.

It cuts with a utility knife or scissors. It can be held in place with staples, nails, glue or spray adhesive, and it needs no maintenance. By reducing stress on heating and cooling systems, it helps keep a home warmer in winter and cooler in summer. It also offers some soundproofing when used in walls, ceilings and floors.

Color

Silver

Size

2 ft x 10 ft (24 in x 10 ft)

Core

5 mm closed-cell foam

Construction

Double-sided reflective radiant barrier

Heat reflection

Reflects 97% of radiant heat; emits less than 3%

Fire rating

ASTM Class 1 / Class A; passed ASTM E84 and ASTM E2599