INSULATION MARKETPLACE SmartSHIELD -3mm 16 inchx25Ft Reflective Insulation roll, Foam Core Radiant Barrier, Thermal Insulation Shield - Engineered Foil
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Availability:
In Stock.
Arrives
Monday, Aug 17
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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
Product Dimensions: 16"L x 300"W
Global Trade Identification Number: 22
Brand Name: INSULATION MARKETPLACE
Global Trade Identification Number: 22
Manufacturer: Insulation MarketPlace LLC
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)
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If you place your order now, the estimated arrival date for this product is:
Monday, Aug 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
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.
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Reviewed in the United States on February 6, 2021 by Chris Higgins
Size: 16"x10ft
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.
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Reviewed in the United States on June 13, 2026 by Jerry Salazar
Size: 16"x10ft
Definitely worked to cover windows and keep the room cool
Reviewed in the United States on July 3, 2026 by K
Size: 16"x50ft
Great product and easy to install. Made a big difference in temperature inside our rv cabinets. First delivery was delayed but my second order arrived on time.
Reviewed in the United States on March 21, 2026 by Deanna
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.
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Reviewed in the United States on July 4, 2026 by MadCarpenter
Size: 24" x 10ft
This is just what II needed to insulate my feral cat houses. They kept the kitties warm and the darkness it provided inside helped with their safety. The roll is more than enough to do other projects with. I made some self heating cat beds like the ones that I got here on Amazon. Very cost effective especially if you have a good many cats, Its been two winters and I think I'll add another layer. They also keep the cats cool on the summer, I take out the cat warming bed and add straw.
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Reviewed in the United States on May 21, 2026 by Garnet & Black
Size: 48" x 50ft
I bought this to insulate a 10‘ x 10‘ garage door and I will update on how well it works after I test it for a day or two, but it was very easy to apply to the door using the vapor tape and my door still goes up with it on there. I will say I can’t put the door up the entire way without messing up the bottom part of the insulation, but that’s no big deal. I can still put it up 9 feet out of 10.
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Reviewed in the United States on June 28, 2026 by TundraGuy
Size: 16"x10ft
I used this insulation to line the inside of a home-made 3D printer filament dryer. Unfortunately, the insulation seems to have done very little in the way of improve the heat loss through the sides of the dryer. The outside of the box still gets just as hot to the touch as it did before I installed the insulation. I have noticed that it will reach an internal temp of 80 deg C in a little over 24 minutes, where before it would take about 26 to 27 minutes to reach the same temperature. So it might have added some insulation value, just not as much as I would have hoped. but I can see I am still loosing a significant amount of heat conducting through the sides. Because after running for 90 minutes, the exterior is still holding steady at around 58-63 deg, which is the same as it was before the insulation was installed. I havent measured the amp draw of the heating element to see if that shows a reduction in amperage over time. but just a ballpark guess, the heating element seems to turn on and have the same duty cycle as it did before. (didn't time it before installing to get a baseline measurement, just not observing any noticeable obvious improvement). Otherwise the insulation was easy to install. I used a high temp double sided tape to secure it, which seems to hold well, The foil coating appears durable. and over 8 hours of continuous exposure to 80 deg hasn't damaged, discolored or otherwise affected the insulation in any way that I can tell.
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Reviewed in the United States on January 18, 2025 by RDR_Engineer