Window Gaskets That Will Keep Your Windshield Stable

Window gaskets are lengths of rubber that place a secure seal between a glass and a body panel. They are an essential part of your car that needs to be immediately replaced when damaged. How can you replace them? For starters, you will need to pick the proper gasket window seal for your car. Below, I have compiled a list of the best ones and how to pick them. First, let’s look at what precisely a window gasket is and how it works.

What Is a Car Window Gasket?

Rubber gaskets are way more common than you think. They can be found on all types of glass, from your car windshield to your kitchen windows. They help seal our windows and prevent rain from coming in. When replacing your windshield, you should always change the rubber caskets as well, but what are they exactly?


Depending on the purpose, there are different types of window gaskets. They are made of foam profiles with D-shapes, C-channels, U-channels, or various types of glazing seals. The standard rubber gasket – the one you have in your car – either features a locking or self-locking mechanism. The former is a two-piece gasket that locks into position with a lock strip or key. The latter is a one-piece window seal that does not require any attachments.


A gasket seal can help hold the glass in place while also providing sealing and insulation. The airtight seal prevents cold air from entering and warm air from leaving. Window gaskets are typically made of rubber and installed along the edges of windows, such as car windshields. Window gaskets are also used with household windows and moveable glass. 


Quality gaskets are a vital part of any window or door. Not only do they provide an all-important seal between the opening sash and the outer frame, but they help keep the elements out. If you notice a fault in the window gasket, you should immediately replace it to safeguard the integrity of your window. Apart from that, the glass rubber seal can help prevent longer-term issues such as mildew, dampness, and rot.


Window gasket replacement is not always an option, and a good alternative is to cut out the top of the existing bulb and apply an elastomeric sealant. Although this will be less expensive in the short term, the repair method itself is inherently flawed. The relatively short life expectancy of adhesives creates an ongoing maintenance issue that you will have to deal with sooner or later. However, if you go with this method, it’s important to note that with one misstep, the adhesive will block the frame, causing moisture to build up. 

On the other hand, if air and water are infiltrating through the window, this may result from aging frames. The frames have most likely developed cracks at welds and stress points. If that’s the case, it may be possible to retrofit the existing assembly rather than replace it – that is, if the window is still structurally sound.

When Is the Time to Consider Replacing the Window Gasket?

The rubber gasket, also known as weatherstripping, is what keeps the window function. As with most things, however, you will have to replace the gasket over time. You’ll know it by identifying a leak or when a seal gets torn, even missing in places. Most of the time, however, it won’t be as noticeable. As a general rule of thumb, if you seek the road through the bottom crack of your door, you should have replaced the weatherstripping a long time ago.

Sometimes, you could require a new window gasket and not even know it. Have you noticed if construction sounds are getting louder? Or that highway hum? If the answer is yes, then you may require a new rubber gasket. Generally, the window seal acts as a sound barrier for your car. If you hear more noise from outside, that means the rubber gasket has been disturbed.

The other way to know when it’s time for a replacement is when the inside of your window is wet. On a rainy day, your rubber gasket protects the interior of the car from unwanted water. If you notice wetness around the inside of your windows, consider replacing the gasket. Don’t forget the backdoors as well. It can get nasty fast if you allow mold to develop.

Another way to know if you need a new rubber gasket is when you blast your AC or heating and only feel the effects for a short while. If the problem is not from the air-conditioning system itself, all your efforts might be going out the window.

The simplest way to tell whether you need a new window gasket is if they just look worn out. If the rubber is dried out, cracked, discolored, or droopy, it needs to be replaced. Not only will old weatherstripping leave your vehicle vulnerable to mold, moisture, water, and so much more, it will also leave it looking old and battered. 

If your car is over 25 years old and still has the original rubber gasket, you should also consider replacing it. Undoubtedly, the weatherstripping has taken quite a beating over the years. Still, more importantly, the technology they used to make the rubber back then is not as reasonable as it is now. 

Remember this as well: If the weatherstripping looks deflated or flattened, it’s technically still in one piece, but it’s not doing its job. The same thing goes if it seems battered or brittle.

How to Replace the Window Gasket on Your Car Windows

Window gaskets can come in lengths of rubber that you can cut yourself. Otherwise, you can buy locking gaskets that are cut-to-size and arrive ready to install. Although if you don’t have enough experience and cut the rubber yourself, it will end very badly. Locking gaskets may be a bit more expensive in comparison, but they are way easier to install. In my opinion, it’s the better option, especially if you are not a mechanic.

Now that you have bought the rubber gasket and have identified the issue, it’s time to start replacing it. What if only part of the seal is broken? Can you replace only that and keep the rest intact? Technically yes, but I wouldn’t recommend it. The reason is that it’s more effective to replace the whole thing. Also, you will not have to worry about the window gasket for a long time. How do you go about replacing it?

Remove the Rubber

Now that all that is taken care of, let’s move to the actual installation. Let’s start with removing the rubber. For the new window sealer to be installed, you will need to remove every inch of the last one. I like to use a flat-head screwdriver to ease the rubber out gently. However, you can use whatever you have handy. Just be careful not to scratch the surface. 

Clean the Area

After removing the rubber, you shouldn’t rush with the new one. There definitely will be some glue left over. So now, it’s cleaning time. Lubricate the window gasket with a mixture of soap and water or a silicone-based spray, whichever you have. I would recommend holding the spray in one hand and cardboard in the other, so you don’t spray your whole car by accident. After all that is done, it’s time to sand the metal. Grab fine-grit sandpaper, and start rubbing in circles. Try to keep it on the seal, or you might ruin the car’s appearance.

Apply a New Window Gasket

There isn’t much left after that. Place the rubber in the window. When you feel slight pressure, you will know that it fits perfectly. Now, all that’s left is to apply the adhesive. Wait ten minutes for it to become a little more complicated, and gently place the rubber on top while using a small amount of pressure. Make sure there are no gaps in between and that you don’t stretch the rubber. Now, press down on the entire strip, and you should be set.

Window Gaskets – A Buyer’s Guide

Choosing the proper weatherstripping can be a bit on the difficult side. Once you have selected whether you want a locking gasket or not, you will have to make another choice. You can either buy a factory replacement or a generic. Generic gaskets are pretty sketchy, and they are best suited for older cars that you won’t be keeping long. If you want to fix your gasket, the only way is with a factory replacement. Most often, you can get them from a car dealer, but aftermarket replacements work just fine. However, before you start ripping stuff out of the car, take a moment to compare the two gaskets and see if they match.

Choosing the correct rubber seal is extremely important. If the window channels are too small, they won’t be able to fit. Likewise, if you try to force them, you might break the glass. On the other hand, rubber gasket seals that are too large won’t provide excellent insulation and leak. To figure out what size you need, measure the thickness of the glass the gasket needs to cover. All there’s left to do is measure the height and width. Finally, add those numbers together. Multiply what you got by two, and that’s the overall length of the locking gasket you will need. However, remember that rubber can shrink and stretch, so it’s best to be careful when cutting the gasket and installing it.

There are many places where you can buy a window gasket replacement. The one that immediately comes to my mind is Amazon. There are a ton of premium manufacturers, and you get to choose the length. I have taken the time to show you my favorite gaskets. These are the ones that I have used.

1. Window Rubber Seal Locking Gasket for Windshield and Window Cars, Boats, and Heavy Equipment

Window Rubber Seal Locking Gasket for Windshield and Windows Cars, Boats and Heavy Equipment (25 Feet)
  • 3/32″ Panel thickness, 13/64 glass thickness.
  • High quality materials.
  • High quality manufacturer.

Last update on 2024-04-15 / Affiliate links / Images from Amazon Product Advertising API

I love this product because you can choose whichever length you need. From 5 feet to 250 feet, you can get whatever you need. However, I wouldn’t recommend a product if it was just really long. This window gasket is made of high-quality materials, and it’s incredibly flexible, not to mention durable. I would recommend getting one of the more extended options. This way, you will have quality rubber whenever you need it.

2. Universal Self-Adhesive Auto Rubber Weather Draft Seal Strip

33Feet Long Universal Self Adhesive Auto Rubber Weather Draft Seal Strip 51/100 Inch Wide X 1/5 Inch Thick,Weatherstrip for Car Window and Door,Engine Cover (2 Rolls of 16.5 Ft Long)
  • ⭐⭐ –Important: Extreme temperatures will result in poor adhesive performance. Apply this seal only if the air and surface temperature is…
  • ⭐ — One roll specification:13mm (51/100 In)width x 5mm(1/5 In)height,length 5m(16.5Ft),total of 2rolls length 10m(33Ft).
  • ⭐ –An upgraded universal car truck sealer weather striping used to replace other Type D, P, Z and O stripe. Easy to install and high strength…

Last update on 2024-04-15 / Affiliate links / Images from Amazon Product Advertising API

The reason I love this product is because of its versatility and high quality. You can use this rubber gasket on anything from your car or RV door to a bed railing. Even more remarkable is that the seal provides strong isolation, airflow control, and even vibration absorption. This product is also environmentally friendly.

3. CICMOD Car Door Seal

CICMOD Car Weather Stripping 49.2Ft Universal Self Adhesive Auto Rubber Draft Seal Strip for Window Door Engine Cover Trunk B Shape Black
  • 【Wide Application】 – Universal self adhesive car door seal strip for various vehicle’s window, door, engine cover and trunk, etc.
  • 【Versatile Rubber Door Seal】 – Waterproof, snowproof and windproof car seal strip. Seal the gap between car door, car body, car hood, car…
  • 【Upagraded B Shape Design】 – Compared with other shape, such as D, P, Z and O shape, our car door seal is flexible. The best shape works for…

Last update on 2024-04-15 / Affiliate links / Images from Amazon Product Advertising API

I love this product because it’s everything a window gasket should be. It’s versatile, and you can use it on your window, door, engine cover, trunk, etc. It’s also really high quality with noise dampening and rubber that is waterproof, snowproof, dustproof, and windproof. If you are looking for the best quality for your vehicle, I can’t recommend this RV window gasket enough.


Whether you are looking for a new window gasket replacement or just curious, it’s essential to know the ins and outs of car management. The whole rubber gasket seals business is the very fundamental of that. Of course, if you need to replace a windshield, you will also need to know how to replace the weatherproofing. When you add everything together, the cost jumps by a lot. On the other hand, if you just need the best sealant to fill in those cracks, replacing the gasket is not required, but you might also check if it’s alright. Whatever the case, keep an eye out for that rubber.

Best Selling Window Gaskets

Last update on 2024-04-08 / Affiliate links / Images from Amazon Product Advertising API