Windshield Leaks When It Rains – Causes and Fixes

Rainy days are often troubling for many folks, as it becomes challenging to leave the comfort of your home. Nevertheless, car owners can comfortably drive to their destination without getting wet due to the vehicle’s protective features. However, a leaky windshield may spoil your day; hence, if your windshield leaks when it rains, you should treat the matter with much urgency.

Have you ever noticed your car’s windshield leaking when it rains or during the car wash? Well, this problem can show up at any time. Nevertheless, it starts with gradual symptoms and grows worse with time.

Thus, you may notice your windows getting fogged up and the vehicle’s carpet getting wet. Sometimes, you may not necessarily see the leak, but the terrible odor from the car may tell you that such occurred.

Thus, you need to look into this issue and find the perfect solution to fixing such. I would be revealing some common reasons your windshield leaks and how to fix such a problem.

Windshield Leaks When It Rain

Why Is My Windshield Leaks When It Rains?

The windshield of vehicles comes with excellent construction that protects the inside of the car from various elements. The auto glass appears to be held by urethane, which works well with molding to keep out air, water, and dirt from entering the car from that area.

However, this essential seal may weaken, causing some leaks, and this seems like the most typical reason your windshield leaks when it rains. With that in mind, the following are some more reasons behind a leaky windshield.

Installation During Wrong Climates

 Is there a specific climate for windshield installation? Not really, but it would also seem like a bad idea to replace your car’s windshield during the rainy season. Remember that car experts use urethane to keep the glass in place, and if the windscreen seems wet, the urethane may not stick.

Thus, there are likely to be spaces that let in water to the inside of your vehicle when it rains. Hence, the summer season seems like the appropriate time for such installations, as the weather is generally dry during such periods.

Nevertheless, you can try specific hacks to effectively install your windscreen if you need to do so during the rainy season. It would be best to install the new windscreen away from moisture and let the urethane stick properly before driving in the rain.

windshield seal repair near me

Poor Installation

Some common causes of a windshield leaking when it rains often result from poor installation and handling. Without a doubt, there are various ‘car experts’ out there that appear inexperienced, and using such services may cost you a lot.

Hence, it is recommendable often to use the services of a trusted and experienced expert auto mechanic. Windshield installation requires the right tools and the right amount of urethane to keep the glass in place. If there is a compromise during the installation process, the windshield may end up with leaks.

So, if you notice some water leaks after windshield replacement or notice some bubbles on the glass, kindly visit the auto expert quickly. There are various top-performance service stations for cars within the US, and you can find one close to you while searching for the “windshield leak repair near me.” You are bound to find some excellent options.

Old Car Models

The use of urethane for keeping the car’s windshield in place does not apply to many old car models. Such vehicles use rubber gaskets, which tend to deteriorate with time and appear pretty loose. When such a thing happens, you would often find the windshield letting in water when it rains.

Thus, you may need to replace the rubber gaskets to fix this problem. Kindly take the vehicle to an auto mechanic for an expertise replacement of the worn gasket. Such an action would prevent leakages.

Common Signs of a Leaking Windshield

A leaking Windshield may seem pretty tricky to notice, but it appears very easy to fix. This issue may start with some invisible symptoms, which you may rarely see. Nevertheless, you can get a quick alert from your car’s windshield leak detector.

At first, it may prove challenging to find the leak source because a wet car carpet or seat may not mean the windshield is the culprit. This problem could also come from the vehicle’s windows or somewhere else.

Nevertheless, various signs could tell you that your windshield is leaking. Therefore, it would be best to learn about these signs, as they can help you notice the problem early and ensure you opt-in for a quick fix.

Here are a few signs of a leaking windshield:

Damp Carpets

Wet carpets within the car are common signs of a leaking windshield, as the carpet gets damp with moisture seeping through. Nevertheless, there are other reasons why your vehicle’s carpet may appear moist; thus, it would be best to ascertain that the windshield is indeed leaking.

Mineral Stains and Discoloration

You may start noticing some streaks and spots of white “colorings” on your dashboard. Such mineral Stains may also appear on the inner part of the glass. Once you see these stains, it would be best to conduct a thorough diagnostic and take the vehicle to a car expert.

Rust Spots

Moisture on metals may easily cause rust due to oxidation, and finding rust spots on various parts within the car can be due to a leaky windshield. Such deterioration comes as tiny red spots that you may find on car door panels, floorboards, and various dashboard areas.

Musty and Moldy Odor

Wet car seats and carpets can often serve as a thriving spot for microbes, and as such, you may start perceiving some musty smell. Unfortunately, such a smell may start and would rarely go away right before mildews and molds appear on the wet surfaces.

Foggy Windows

Another common sign of a leaking windshield is a fogged-up window after it rains. Such foggy interiors reveal the presence of entrapped moisture within the vehicle that causes the ‘steam.’

How Do I Stop My Windshield from Leaking?

Having a leaking windshield can be a severe problem, and as such, you mustn’t overlook it. A wet car seat would keep you less comfortable, and the molds can trigger some allergies. Again, there can be some damages as the moisture gets in contact with some components on the dashboard, causing some electrical problems.

In extreme cases, the car won’t start, or it may stop abruptly, and there may be issues of improper connection resulting from rusted electrical contacts. Hence, a leaky windshield is not something that you should ignore. Nevertheless, it would be best to ascertain if the moisture seeping into the car is from the windshield or some other source.

With that in mind, here are two significant tests you should conduct to diagnose if your car’s windshield has some holes that let in water when it rains.

Shower Test: Kindly close the doors and windows of your car and ensure you protect the vehicle’s interior from facing moisture damages. Then, splash water across using your garden water hose. As you use the water hose, ensure you apply the water at low pressure to prevent it from bouncing off due to the force.

It would be best to start at the windshield’s lowest part and then work your way upwards. While you are at this, look through to find if the windshield is leaking. It would also help if you get someone to watch from the inside of your car, as such assistance can help you notice when the water starts streaming towards the cabin.

windshield leak detector

Soap Test: Please, get a wash mitt and apply some soap onto it. Then, rub the soap onto the exteriors of your windshield (the trim area). Continue by defrosting the car as you turning on the heater blower.

You can also seek the help of someone to help blow air around the glass edges from within the vehicle with the aid of an air nozzle. Look closely; you are sure to find soapy bubbles where the leaks occur.

Once you’ve confirmed that the windshield has holes that let in water when it rains, then you should plan on fixing the problem. The first step is finding where the windshield leaks, as it would help you fix the issue appropriately. Here’s what you should do:

Try Fixing the Pinholes

The Pinholes on the windshield can make moisture leak through and get into the vehicle. Thus, it would help if you looked for seam-sealers to fix this problem. You can find these effective sealers online and apply them easily since they come in tubes. Don’t freight about the drying of these seam-sealers, as it only takes a few minutes for them to dry.

Work on Improper Seals

If you notice a loophole in your vehicle’s windshield sealant, it would help if you reapply some sealant to keep the hole closed. One recommendable option is Vandals, as it remains pliable and works as an effective butyl adhesive or sealant. It would also work well to fix the issue of the rear windshield leaking. You can quickly get one from an auto store near you.

Then, apply the Vandals using a caulking gun, supplying the sealant under sir pressure. Allow the adhesive to dry (within some fee minutes); after it dries, you can decide to test if the windshield still leaks.

Ensure that you don’t use silicone for sealing the windscreen, as it does not remain stable with temperature change. You may find silicone expanding in heat and contracting under cold conditions.

Note: It may not be a good idea to fix a leaky windshield yourself, as this job requires some expertise. Using inappropriate products or tools can further the issue, causing some severe damages. Thus, it is recommendable to employ an expert auto mechanic and certified windshield replacement technicians.

windshield leaks when it rains

Frequently Asked Questions – FAQs

Q: Can a leaking windshield be repaired?

You can quickly fix a leaky windshield and ensure that the inside of your vehicle does not get wet when it rains. Nevertheless, it would be best to use the services of an expert mechanic to ensure that there are no further issues.

The windshield leak repair cost varies but ranges between an average of $60-$100. Kindly note that the extent of the damage or leakage and the expert’s labor would influence the price significantly. Nevertheless, it is worth repairing a leaking windshield, as it saves you and the car from grave dangers.

Q: Will insurance cover a leaking windshield?

You can fix a leaking windscreen covered by insurance with comprehensive coverage, which often has policies handling various damages resulting from the moisture. However, most insurance coverage focuses on auto damages that do not result from maintenance issues.

Thus, you may need to reach out to your auto insurance company and determine if your insurance policy would take care of some or all the repairs. Whatever be the case, you should endeavor to fix this problem on time.

Q: How do you reseal a windscreen?

In a bid to reseal the windshield of your car, you would need to get an adhesive remover or a paint thinner. These products would effectively work for cleaning beneath the seal and around the exterior trim of the glass.

Then, it would help if you worked on making the area smooth to prepare it for accepting the sealant, making sure it stays in place without any hassles. Once done, you should start applying the windy sealant, ensuring you don’t skip a point. After the adhesive dries, the leaks should be fixed.

Q: Does Safelite fix windshield leaks?

Safelite is an excellent option for fixing your windshield leaks, as they have experts that work on improving windshields, rear windows, and side windows. It is pretty imperative that you use the services of knowledgeable and certified technicians, who can fix windshield leaks, and you can find one at Safelite.

Kindly note that these technicians would only use the right products and tools for getting this problem solved, and as such, there are fewer chances of this issue reoccurring in a short while. So, you can rest assured that the windshield would not develop further damages.

Q: How do I find a leak in my windshield?

A leak within the car when it rains may not necessarily mean that the windshield has holes.  Thus, it is crucial to find any possible leak around the windshield before making further decisions on fixing the leak.

You can know if the windshield appears to be the culprit by conducting a shower test. Kindly splash some water on the glass using your garden water hose; by now, the car’s interior should be moisture proofed and doors and windows shut.

 Then, look out to find where the windshield leaks. Alternatively, you can rub some soap onto the windshield and apply direct air around the area using an air nozzle or compressor. Wherever you notice, some bubbles would tell that the windshield leaks at that spot.

Q: Will a cracked windshield leak water?

Cracks on windshields can easily let in water inside the car when it rains or while you are washing it. Thus, it is essential to fix even the slightest crack, as ignoring such could lead to various moisture damages. Also, kindly note that cracks on the car glass may spread further due to the effects of ice and snow, and even while you’re cleaning the windshield.

So, it is dangerous to let such an issue linger for a while before solving it. Furthermore, with such compromise on the windshield’s structural integrity, it may seem difficult to drive since the water seeping through the glass layers may leave you with a blurred view of the road.

Q: How can one tell if the windshield seal is bad?

When the sealant or rubber gasket that keeps the windshield in place starts deteriorating and the windshield leaks when it rains, you may notice some white discoloration on your dashboard. Again, you may begin perceiving some musty and moldy smell right before you start seeing molds and mildews.

Since moisture appears entrapped within the car, your windows may seem foggy. In addition, it is common for metals to rust when in contact with water due to oxidation, and you may find some parts within the vehicle rusting if the windshield seal is in bad shape. Thus, it would help if you looked forward to a windshield seal replacement.

Q: How do you apply windshield sealant?

You can start applying a windshield sealant after preparing the glass edges. So, it would help if you cut the windshield’s tip or remove it with a thinner and place the tube of the windshield sealant at a position that would allow the flow of its content. Then, apply gently around the edges, ensuring that you don’t skip a point.

If you skip a point, there are great chances of the windshield leaking again; hence, you should “take care” in applying the sealant. Once done, let the windshield sealant dry; it usually takes a few minutes.

Q: Does windshield sealant work?

Windshield sealants are pretty effective, as they come formulated to fill in cracks and holes around the glass edges. The durability of most options you find in the market is excellent, acting tough like glue. Interestingly, the best windshield sealants appear to be weather-proofed.

So, you can rest assured that such sealants would not get affected by ice or water and can effectively withstand extreme temperatures. In essence, if you apply the windshield sealant appropriately, there should be no further leaks from that area.

Q: What is the cost of replacing the windshield of a car?

The cost of replacing a car’s windshield appears to be within an average price range of $100-$400 for the car part, with labor between $210-$230. However, kindly note that the price varies from car to car and can even reach $1,500 for luxury vehicles.

Thus, you should check with the service station near you and supply the details of your car make and model, alongside details of the extent of the damages. With that, you can learn about the exact price for fixing this problem.

How-To Diagnose a Leaky Windshield YouTube

Final Words

The windshield of cars effectively protects the car’s interiors from wind, water, dirt, and dust particles. This component stays in place with the help of a glass sealant or rubber gasket (in old car models). However, when the sealant or rubber gasket starts weakening or deteriorating, you may notice that your windshield leaks when it rains.

Nevertheless, it would help confirm if the windshield indeed appears to be the culprit of the moisture leaks within the vehicle. Once approved, you can seek the help of an expert mechanic to fix this problem. If you trust your abilities, this article provides some excellent DIY tips for fixing windshield leaks.

Read More:


Hi there, I am R. Hasan Tito, a mechanic, and owner of this website. My friend and I created this website to share our knowledge, expertise, and experience with our fellow mechanics' community and car users. I am a specialist and certified automotive mechanic (Both Heavy Commercial and Private Cars). I worked as a Mechanic and Mechanic Supervisor for over fifteen years at Global Rebound Automotive companies - Toyota, TATA, BMW, Nissan, TVs, and Others. Now, I enjoy my new role of leading a team of automotive experts (in their respective fields) and publish new content on a regular basis on my website and social media.

Leave a Reply

Your email address will not be published. Required fields are marked *

Recent Posts