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INSULATION MARKETPLACE

INSULATION MARKETPLACE SmartSHIELD -3mm 16 inchx25Ft Reflective Insulation roll, Foam Core Radiant Barrier, Thermal Insulation Shield - Engineered Foil

  • Based on 7,693 reviews
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Availability: In Stock.
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Arrives Saturday, Oct 10
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Size: 16"x25ft


Features

  • EXTREMELY EFFECTIVE - Reflect 95% of radiant energy, perfect RADIANT BARRIER!
  • VAPOR BARRIER -Unaffected by humidity and moisture, can be used outdoor/indoor!
  • SOUND BARRIER - excellent sound deadening material, effectively blocking sound waves.
  • SUPREME QUALITY - 3mm closed cell polyethylene FOAM (not a cheap bubbles) sandwiched between highly reflective Engineered Foil on both sides. Easy to install, easy to cut and easy to clean, Strong but lightweight.
  • NON TOXIC - will not irritate skin, eye or throat. Non allergic.

Description

THIS IS NOT A CHEAP DOUBLE BUBBLE REFLECTIVE INSULATION, WE HAVE A SUPERIOR QUALITY REFLECTIVE FOAM CORE INSULATION, FOAM CORE RADIANT BARRIER, COMMERCIAL GRADE!!! WHERE TO INSULATE?

Material: Polyethylene (PE)


Brand: INSULATION MARKETPLACE


Item Thickness: 3 millimeters


Recommended Uses For Product: Attics, Ceilings, Walls, Steel Buildings, Roofing, Concrete Floor, Radiant Heat in a Concrete Floor, Radiant Heating Under a Wood Floor, Cathedral Ceiling, Water Heater Tank, Radon Barrier, Water Pipe and Air Duct, Reflective Ceiling System, Behind a Hot Water Radiator, Crawl Space, In Ground Swimming Pools, Shed, Fish & Hunting Shelter, Cooling Room, Cold Chamber or Wine Cellar, Concrete Block Wall, Cavity Wall for Metallic Studs in Commercial Buildings, Foundation Wall, Above Ground Swimming Pools, Quanset Hut, House Wrap. See more


Product Dimensions: 16"L x 300"W


Brand Name: INSULATION MARKETPLACE


Global Trade Identification Number: 22


Manufacturer: Insulation MarketPlace LLC


Number of Items: 1


Model Number: SmartSHIELD -3mm


Manufacturer Part Number: SmartSHIELD -3mm


Item Thickness: 3 millimeters


Item Dimensions L x W: 16"L x 300"W


Coverage: Broad building insulation coverage


Material Type: Polyethylene (PE)


Recommended Uses For Product: Attics, Ceilings, Walls, Steel Buildings, Roofing, Concrete Floor, Radiant Heat in a Concrete Floor, Radiant Heating Under a Wood Floor, Cathedral Ceiling, Water Heater Tank, Radon Barrier, Water Pipe and Air Duct, Reflective Ceiling System, Behind a Hot Water Radiator, Crawl Space, In Ground Swimming Pools, Shed, Fish & Hunting Shelter, Cooling Room, Cold Chamber or Wine Cellar, Concrete Block Wall, Cavity Wall for Metallic Studs in Commercial Buildings, Foundation Wall, Above Ground Swimming Pools, Quanset Hut, House Wrap.


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • Excellent performance and easy to install—raised basement area by 15 degrees F!
Size: 24" x 50ft
I used this to insulate a small area of my basement for indoor seed starting. Previously that area was very cold, and had effectively no insulation between it and an outdoor crawl space (aside from a few semi-loose plywood boards), and the area was also on top of a big poured concrete pier/slab thing. So basically, the air was around 50 F in the winter and the surfaces were cold. Also, drafts (outside air) came in from the crawlspace through slits between boards. This is despite all the seed starting gear (lights, heating mats, etc.). In previous years I have even put a small space heater down there in an attempt to try to get the soil up to 60 F+, which is where I want it to start things like sunflowers. So I bought a 50-foot roll of this stuff and cut three 14-foot strips of it. I tacked one long strip along the area that meets the crawlspace. (Used a staple gun—not sure if that's the right choice, but it's what I had.) I also laid a long piece on the concrete surface (no attachment, just laid it down and put plant mats directly on top of it), then added a third piece that ran between that surface bit and up to the wall/crawlspace interface. I stapled the that third piece onto a wooden beam, and used packing tape to attach the lower pieces where drafts were trying to blow through. This allowed a mostly leak-free insulation shield about 6 feet "high" by around 14-ish feet wide. I put back the same temperature monitor that had read 50, and within a few minutes it was up to 55. Hmm. That's good. After I reinstalled all the seed starting stuff (a few low-power heating mats, four low-power LED lights), the temperature went up to 65 degrees and stayed stable (!!). I have seen a few dips overnight down to 62, but in general this area that was consistently 50 degrees F (WITH lights and heating pads) is now mostly 65 and up (at one point it reached 70, which is actually pushing it as far as seed starting is concerned). The space heater is gone—it would be way too hot at this point, and in fact I'm considering adding a fan or something, triggered in case the temp gets close to 70, just to circulate some of the heat away. For the price, I'm extremely impressed. This stuff definitely created a thermal barrier between the super-cold cement block that the seedlings sat on—that block is such a huge mass that there's no way a heating pad is going to ever warm it up (remember, we're in a basement and this is essentially a secondary foundation wall that just happens to be super wide). The insulation also created at least a basic vapor barrier on the interface w/crawlspace, blocking a lot of drafts and little gaps. The fact that it's so thin and easy to work meant I could also tack it up around edges and corners, which is where the drafts were the worst. I know this isn't really designed to be the only insulation in this use case (I might have been better off installing batts of fiberglass, and would certainly do so if I were trying to treat an entire basement), but it's cheaper, MUCH smaller, MUCH easier to work with, AND you can wipe it down (within reason—it IS possible to rip the shiny surface). If you're looking for something very thin with a good radiant shielding effect, this is it. The only downside I can think of is that the material is thin. While this is usually a positive, you do need to be careful with it, as it's possible to rip the foil layer and have it start peeling off. That's different from a lot of other kinds of insulation (fiberglass batts, foam board, spray...) where the material itself is real tough and workable. This is thin and precise—install accordingly. ... show more
Reviewed in the United States on February 6, 2021 by Chris Higgins
    • Great for camper windows.
Size: 24" x 10ft
Well made, great cost. Used it with velcro to cover windows on a camper. Cools down well.
Reviewed in the United States on September 20, 2026 by John Ward
    • Great fiberglass insulation
Size: 24" x 10ft
Must use gloves when installing; great insulation for windows with air conditioners installed; good for both summer and winter; flexible and easy to fit most areas; does not adhered to surfaces; lightweight; does not give any noise when air conditioner is in use;
Reviewed in the United States on August 13, 2026 by EilisAine
    • So far so good…
Size: 48" x 50ft
Review Image by Christina
Review Image by Christina
Review Image by Christina
We have another heat wave coming in CA so I purchased this product to help keep the heat out. Instead of using aluminum foil over the windows, I wanted something more practical and that can be reused when summer is over. I already have blinds and room darkening insulated curtains. While it does keep it cooler in the house, one side of my house gets the sun during the hottest part of the day - my kitchen and part of my living room wall. On an 80 degree day, the surface temp on that wall is 130 degrees. While the surface temp was 130 degrees, the insulated window was registering at 74 degrees. The pros from day 2 of covering all the windows: it’s 91 degrees and the AC didn’t turn on until almost 4 pm. It stayed under 75 in the house until then. As you can see from one of the pictures, it still allows some light even though it’s placed behind closed blinds and room darkening insulated curtains. But it’s still pretty dark in the house. The cons: It’s pretty dark in the house and my husband who can’t see in the dark will now have a legit reason to turn on all the lights - all day long, lol. Minus one star as the listing states the product is 48” in height and 50 feet long. As you can see, it measures just a little over 47”. I saw another review about this as well on a different sized roll they purchased. Not sure if it’s exactly 50 feet long bc we didn’t have to use the whole roll to cover all the windows. But keep this in mind when ordering. I covered 7 windows, 3 of which are 70” long, 4 that are 46” long, one entire sliding glass patio door (92” long) and still have plenty of roll left to use if needed. ... show more
Reviewed in the United States on July 11, 2023 by Christina
    • Better than expected
Size: 16"x10ft
Review Image by Jerry Salazar
Review Image by Jerry Salazar
Review Image by Jerry Salazar
The sun was beating down on my bedroom window so badly it was warping my blinds. The difference in temperature was almost frightening. Since I used the insulation I’ve seen a massive improvement. And it was So Easy to install. I paired it with 3M’s insulation tape specifically for windows which sealed the insulation right up. The appearance from the outside is in my backyard. And tbh it’s not all that bad. The other benefit besides sealing the heat, is it’s sealed off the drafts as well. I Highly recommend this product to anyone reading this. ... show more
Reviewed in the United States on June 13, 2026 by Jerry Salazar
    • A Smooth Alternative To Foil Bubble Wrap
Size: 16"x10ft
Cuts easily with a utility knife. Fits into tight spaces well. Its thin profile makes its insulating ability even more impressive. Am using it to solar proof the vent install for a portable A/C duct in a south facing window. Looks a bit 'sci-fi', but it sure reflects the sun's heat well. (I imagine it might also make a good sleeve wrapping material for such an exhaust pipe, if cut into a 6" wide strip.) Requires a bit of clear duct tape to overcome its memory from being rolled tightly. Nice to be able to purchase a short roll of it for my small application. ... show more
Reviewed in the United States on July 4, 2026 by MadCarpenter
    • Temperature control
Size: 16"x10ft
I use this to keep my camper cooler. While I was putting it up, I could actually feel the temperature get cooler! It comes in different sizes to suit your needs.
Reviewed in the United States on September 5, 2026 by Paula Plander
    • Smart SHIELD
Size: 16"x10ft
it good. light weight. didn't change the temp. much at all easy to install in window.
Reviewed in the United States on August 13, 2026 by Joe mccord

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