We consider a extra large window insulation kit to be a worthy investment in the long run. Let’s take you step by step, type by type, and find the best extra large window insulation kit for you.

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Our Top Picks:

Best Overall: Buy: Xfasten Extra Large Window Insulation Kit READ REVIEW

Best For Good Quality: Buy: Frost King Extra Large Window Insulation Kit READ REVIEW

Best For Tight Fit: Buy: 3M Extra Large Window Insulation Kit READ REVIEW

Best For Noise Reduction: Buy: 3M Clearest Film READ REVIEW

Best For Good Seal: Buy: Thermwell Plastic Sheet READ REVIEW

Best With Window Kit Tape: Buy: Duck Extra Large Window Insulation Kit READ REVIEW

Best Energy Efficiency: Buy: Thermwell Extra Large Window Insulation Kit READ REVIEW

Best Overall: Xfasten Extra Large Window Insulation Kit

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The Xfasten Extra Large Window Insulation Kit is long-lasting, rigid and fits well with your regular use like a dream. The xfasten extra large window insulation kit works perfectly and it is super sticky. Residue-free window film tape adhesive will not damage surfaces and will not leave a residue nor lift the paint off from your windows upon removal in spring time. Also, the insulation comes with excellent quality, is perfect for great quality and it provides for great adhesion.

Most importantly, the xfasten extra large window insulation kit stops draft and it works really well.

Almost all buyers quickly discovered that the insulation is great for attaching the outside covers to the a/cs. Moreover, a few also found that the insulation is perfect for temporary sealing. Also, a few say that the insulation definitely sealed it perfectly. In conclusion, at the price, they believe that they got a steal of a deal with it.

• This comes with foam tape, is suitable for exterior use and it is very good.
• This can certainly seal windows and prevent air drafts and light drizzles from the rain.
• This keeps out draft and it has excellent adhesion.
• This is a tape to help seal drafty windows.

Best For Good Quality: Frost King Extra Large Window Insulation Kit

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Next on the list, we've got yet another insulation that manages to win our hearts. It's the Frost King Extra Large Window Insulation Kit and it's widely considered as one of the most convenient insulation you can buy. The frost king extra largewindow insulation kit is suitable for use on problem windows, allows for easy installing and it is a perfect size. Make sure this fits by entering your model number. In addition, the insulation is almost invisible and it is designed to be worth every penny.

The kit is white, allows for easy installation and it is very good. Finally, the frost king extra large windowinsulation kit is made for patio doors or large sized windows and features a crystal clear plastic sheet that shrinks tight and wrinkle free with any ordinary hand held hairdryer.

Almost all customers quickly discovered that the kit would fit it was 84" x 110. In addition, a few strongly agree that the insulation works well for single pane windows in older homes. And, they say that the insulation has stood up really well. To sum up, for most buyers, Frost King product was what they were looking for.

• This makes a big difference, plus it is perfectly see - through.
• This is very light and compact and much cheaper than buying other light - weight options.
• This provides a great deal of insulation.
• This can be used in most modern homes.

Best For Tight Fit: 3M Extra Large Window Insulation Kit

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Next on the list, we've got yet another kit that manages to win our hearts. It's the 3M Extra Large Window Insulation Kit and it's widely considered as the kit that has the most suitable features. The 3m extralarge window insulationkit saves energy and it saves energy. This kit enables you to insulate one patio door measuring 6 feet 8 inches by 9 feet. This kit includes insulation film and a roll of double - sided mounting tape to create an airtight seal.

The kit offers the clearest film, reduces condensation, stops cold drafts, saves heating costs. Above all, the 3m extra large window insulation kit is very strong, blocks out the wind and it saves money.

Almost all buyers found that the insulation will last an entire year. In addition, they also found that the insulation makes an exterior film that is weather resistant. In addition, they strongly agree that this film is applied to the outside window frame and will help insulate the window.

• This is perfect for the winter months.
• It is sturdy, is made for easy installation and it is for indoor use.
• This is a good quality material.
• It saves energy and reduces heating costs.

Best For Noise Reduction: 3M Clearest Film

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The 3M Clearest Film might be a relatively new release, but it's still nothing short of impressive this year, thanks to multiple price cuts and added new features over the past few months. The 3m clearest film is cut with scissors, It is perfect for simple installation and has a good design. The cost of heating your home may be rising, but there's something you can do. The film measures 10 square yards, or 5.16 feet by 17.5 feet by 0.75 thousandths of an inch ( h x w x d ), and weighs 0.33 pounds.

Above all, the 3m clearest film stops the drafts, allows for easy installation and it is practical.

Almost all customers quickly discovered that the kit is used for energy efficiency windowinsulation kits. Furthermore, a few also found that the kit is great for keeping single pane windows insulated. Moreover, a few say that the insulations are easier to use and sealed better. In short, buyers found this to be one of the best insulations for daily purposes.

• This comes 4 x 8 feet and they can cut it for you.
• This is used to the fact it is actually there.
• This comes with foam tape, feels warmer and it is very good.
• Removes wrinkles for a transparent view.

Best For Good Seal: Thermwell Plastic Sheet

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The Thermwell Plastic Sheet's superior materials make sure that it ages well with use. The thermwell plastic sheet stops the drafts and it makes for plenty of tape. Crystal clear plastic sheet that shrinks tight and wrinkle free with an ordinary hand held hair dryer. Moreover, the kit goes easily cost - effective and it is highly recommend.

Above all, the thermwell plastic sheet includes 1 plastic sheet 84'' x 110'' and double faced tape 1/2'' x 42.

Almost all buyers opine that the insulation is as easy to install as the other stuff. And, a few strongly agree that the wind will cause the plastic sheet to billow like the sail of a ship.

• Increases the value of single pane doors up to 90.
• This works very well and it is used for indoor use.
• For patio doors or large windows.
• This is great for good seal and it is used for the bottom.

Best With Window Kit Tape: Duck Extra Large Window Insulation Kit

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Duck is known for creating pragmatic and minimalist insulation for people on the go, and its line of Duck Extra Large Window Insulation Kit definitely falls in line with that reputation. The duck extra largewindow insulationkit includes crystal clear shrink film and window kit tape. Window film needs to be cut to an appropriate size to fit your windows or patio door. And, it comes with tools needed measuring tape and it allows for easy installation.

Above all, the duck extralarge window insulation kit is great for indoor use and it goes on easily.

One customer says - "It went on with ease and after using the blow dryer it shrunk where you could even tell it's on the window. ". Most customers opine that the kit reduces cold air leaks and is also great for leaky windows. In short, the tone of buyers is very positive and we believe that the kit suits the purpose.

• This comes with a hair dryer to remove wrinkles.
• Good investment for the long term.

Best Energy Efficiency: Thermwell Extra Large Window Insulation Kit

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The Thermwell Extra Large Window Insulation Kit should be able to handle its purpose and duties with ease. Make sure this fits by entering your model number. . In conclusion, with a 4.0 rating and more than 288 buyers, the thermwell extra large window insulation kit stands as the best choice.

Almost all buyers opine that the insulation includes the tape for the job. Moreover, a few say that the insulation will also hold up better in the wind because it will flap around less.

• The Kit includes 0.5 in. x 84 ft. tape.
• Dimension - 1.14 x 0.91 x 0.64 in.
• For 1 extra large window or 5 standard windows.
• Size - 62 x 210 in.