The Best Window Insulation Kit Of 2025 So Far, According To Reviews

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When temperatures drop, the last thing you need is a drafty house. A bit of extra cold air seeping in from improperly sealed windows can mean higher energy bills and a shiver any time you try to enjoy the view outside. If you are tired of your windows not being insulated enough in the winter, you may wonder if window insulation kits are worth buying. These kits include a plastic film that goes over your windows, sealing off any gaps letting your expensive warm air escape and the bitter cold to sneak inside while still allowing a clear view and sunlight to come in. If you are able to muddle through the wide variety of options and find one with solid reviews that will work well on your windows, a window insulation kit could absolutely make a difference in the internal temperature of your home and the cost of your heating. One of the best kits available this year, according to reviews, is the Duck Brand Window Insulation Kit.

The Duck Brand kit costs about $15 for a box that insulates up to 10 windows. The kit includes two rolls of tape and two rolls of plastic film that can be cut to fit your windows. To apply the plastic for a quality seal and clean looks, you will need scissors and a hair dryer. With an average rating of 4.5 stars on Amazon from over 4,300 users and numerous reviews praising the product's affordable price, easy application, and effectiveness, the Duck Brand kit is worth considering if you are looking to better insulate your home this winter. Of course, you should also be aware of more critical reviews and bits of advice from users if you're looking to try out this kit to button up your home's windows.

Before installing the Duck Brand insulation kit, it's important to know that it is designed for indoor windows but shouldn't be used for certain materials, including plaster, drywall, and unfinished wood. While the process may seem a bit difficult or messy, reviewers share that installing this window insulation film is straightforward. One reviewer raved about the ease of application, writing, "You really don't have to measure before you cut!" Another noted the clean, tight finish and fast setup, estimating, "I did it by myself on a ladder in about seven minutes." Overall, reviewers enjoy the pre-rolled film and find application to be manageable even on larger windows despite the strong double-sided adhesive.

Many users enjoy how well the Duck Brand window insulation kit works, but some note issues with the tape failing. On the product's effectiveness, many reviews say that it insulates the home well, but few provide specific details. One buyer shared, "There was a 5 degree difference in the room after covering the windows on a 30 degree day," adding that the product was worth every penny. Another reviewer shared that the film effectively brought a cold bedroom to the same temperature as the rest of the house for some time but the tape eventually failed, meaning the application process had to be repeated.

As with any kit of this kind, it is important to follow the instructions and avoid common mistakes when insulating windows to reduce the likelihood of some unfortunate events that reviewers may face, such as tearing the plastic or having the tape not adhere well to the wall. Luckily, with enough insulation material to cover 10 windows in one kit, you should have excess material to try again as needed. 

According to more positive reviews, cleaning and drying the window before following the directions results in the tape sticking well and the insulation staying in place. While cleaning is not listed on the back-of-the-box directions, videos from the brand add this instruction. With proper application, some users say that it will last for a whole season or even two. Another feature to consider with window insulation treatments is the transparency. While a few reviewers report having issues with cloudiness, the majority of reviews that mention the clarity are positive, with many using the phrase "crystal clear." 

Overall, no temporary window insulation kit will be completely foolproof, but among top comparable brands, the Duck Brand kit has some of the highest ratings by reviewers on Amazon. If your windows are made of a material that the Duck Brand kit is designed for, it is probably a kit that is worth trying out this winter. Along with a window insulation kit, you may want to experiment with some lesser-known curtain hacks to keep your home warmer, giving you more easy and affordable DIY additions to keep you comfy and lower your heating bills.