The Best Window Insulation Kits to Keep Your Home Warm All Winter

Every fall, I start thinking about our heating bill. We live in an older house, and no matter what we do, some of the windows are just plain drafty. You can feel the cold radiating off them from a foot away.

For years, I’ve relied on window insulation kits to get us through the winter without breaking the bank. It’s a simple idea—you create a pocket of still air between the film and the window pane, and that pocket acts as insulation. It’s a cheap project that makes a huge difference in how comfortable a room feels.

After trying a bunch of different brands over the years, I’ve found a few that really stand out. Some are better for big patio doors, others are perfect for standard bedroom windows. Here’s what I use and recommend for keeping your house warm.

 

 

My Favorite Window Insulation Kits for 2026

3M Indoor Window Insulator Kit

This kit usually runs about $15.

This is the one I use on most of my windows. The 3M tape is top-notch and holds strong all winter, even in our sometimes-damp bathroom. When you hit it with a hairdryer, the film shrinks up perfectly clear and tight with hardly any wrinkles.

It’s just incredibly effective at stopping drafts. One kit covers several windows, so it’s a great value. I’ve seen this recommended all over, and it’s for a good reason—it just works.

The Downside: The film is single-use. Once you pull it down in the spring, you have to toss it and buy a new kit for next season.

 

 

Duck Brand Max Strength Window Kit

You can find this one for around $13.

We have this on our back patio door where the dog is constantly pawing at it. The film is noticeably thicker and tougher than standard kits. It really holds up to abuse from kids and pets without getting punctured.

The tape is also really strong and seems to stick well even on painted wood trim that isn’t perfectly smooth. It gives me peace of mind in high-traffic areas.

The Downside: Because the film is thicker, it takes a little more patience with the hairdryer to get all the wrinkles out.

 

 

Duck Brand Shrink Film Window Insulation Kit

This is the budget pick, usually costing only $10.

When you have a lot of big windows to cover, this is the kit to get. You get a ton of film for a low price, and the quality is surprisingly good. The film feels substantial and the tape holds well for the season.

It’s my go-to when I’m trying to seal up the big picture window in the living room without spending a fortune. It does a great job blocking those drafts and saving on our energy bill.

The Downside: Sometimes the film has creases from being folded in the box that are really stubborn to shrink out completely.

 

 

3M Outdoor Window Insulation Kit

I usually see this for about $12.

I tried this on the outside of our drafty old basement windows one year and was seriously impressed. The adhesive is made to handle weather, so it’s extra-strong and holds up to rain and wind.

It creates a really durable seal and the film shrinks up just as clear as the indoor version. Honestly, you could use this inside too if you have trim that other tapes won’t stick to.

The Downside: Trying to install this on a windy day is a real challenge. You have to wait for a calm afternoon.

 

 

Frost King Window Insulation Shrink Kit

This kit costs around $12 for a multi-pack.

If you have a bunch of smaller windows, this Frost King kit is super convenient. It comes with several pre-cut sheets, which saves you some time and makes handling the film a lot easier than wrestling with one giant roll.

The value is great since one box can cover up to nine windows depending on the size. It’s a solid, no-fuss option for getting the whole house done quickly.

The Downside: The tape isn’t quite as sticky as the 3M or Duck Brand tape. It works, but you need to make sure your trim is very clean.

 

 

Yotache Weather Stripping Foam Seal Tape

This foam tape roll is about $21.

So, this isn’t a film kit, but it’s perfect for certain problems. I use this on the old windows in our garage that I still need to be able to open and close. You just stick the foam tape along the frame to seal the gaps where air gets through.

It’s super durable and because it’s not a film, you can leave it on year-round. It removes cleanly without leaving a sticky mess, which is a huge plus.

The Downside: The foam is pretty dense, so if your window is already a very tight fit, this might make it difficult to close and latch.

 

 

Frost King V73/3H Indoor Window Insulation Kit

For about $9, this is another really affordable option.

This is a classic, simple kit that gets the job done. It’s a 3-pack designed for standard windows, making it a quick and cheap way to seal up a few problem spots without buying a huge roll of film.

I keep a box of this on hand for the guest room windows. The performance is solid for reducing drafts and it’s one of the most common kits you’ll find at the hardware store.

The Downside: The sheets are sized for smaller, standard windows, so they won’t work for larger picture windows or patio doors.

 

 

Duck Brand Rolled Window Insulation Kit

This one is usually the cheapest, at around $8.

This kit is great if you hate measuring. It comes as one big roll that you just tape up over the window, and then you trim the excess film off with a knife. It’s a simple, fast way to apply it.

The film is crystal clear once you shrink it, so you don’t lose any of that precious winter sunlight. It’s a very popular choice for a reason—it’s easy and it saves energy.

The Downside: The film in this roll feels a bit thinner than their “Max Strength” version, so it’s probably not the best for areas with pets or kids.

 

 

How to Pick the Right Window Kit

The main choice you have is between the shrink-film kits and something like foam weather stripping. For windows you don’t need to open all winter, the film is definitely the way to go. It creates that insulating air gap which is super effective.

But for windows or doors you need to use, weather stripping is a better solution. It seals the moving parts without sealing the whole window shut.

Before you buy, just measure your biggest window. Make sure the kit you get has a sheet of film large enough to cover it with a little extra on all sides. It’s a small task that makes a huge difference in how warm your home feels all winter.