Have you ever noticed water pooling on the floor of your car after a rainstorm or run through the car wash? If so, you are not alone. Unfortunately, windshield leaks are a common problem, and they can cause serious damage to your car’s interior.
Written by Nino Kojadinovic
Windshields are designed to keep water out, but sometimes they fail to do their job. In most cases, defective glass adhesive is the culprit. If the seal around the glass is not intact, water can seep through.
Most people think that a leaking windshield is caused by a crack or chip in the glass, but this is not always the case. In fact, there are several common reasons why windshields leak, and often, the problem can be repaired without needing to replace the entire windshield.
I’m breaking down the most significant reasons below:
If the windshield isn’t properly sealed, it can allow water to seep in and cause damage. During the windshield installation, the auto glass technician applies special urethane adhesive on the windshield metal frame (pinch-weld). If, before that, the surface wasn’t correctly prepared, the adhesive may not properly stick to the surface, causing breaks between windshield and frame.
In addition, if the windshield was installed in bad weather, there is the possibility that the seal would be compromised. That is the actual reason why professional auto glass technicians refuse to take a windshield replacement order during rainy or snowy weather.
Another common cause of a leaking windshield is rust. Rust can form on the metal frame of the windshield, causing it to expand and contract. This can cause the sealant to break down, allowing water to seep in. This is especially actual for older vehicles.
Over time, the urethane adhesive that seals the windshield in place can begin to break down, leading to water leaks. As the adhesive deteriorates, it loses its ability to form a tight seal around the windshield’s edges. Often that happens when the poor quality adhesive was used during the windshield installation.
In addition, the deterioration of the adhesive can also cause the windshield to become loose, increasing the risk of an accident.
Cracks and chips on your windshield are more than just unsightly imperfections – they can also lead to severe problems. If a crack or chip is deep enough to break through the windshield’s middle layer, water may be able to seep through and cause leaks. (Read more about windshield structure here)
A leaking windshield is an actual irritation for car drivers. Fortunately, if you identify some warning signs, you will be able to fix a windshield leak before it’s getting too late. Water dripping through the windshield may be almost microscopic, but some warning signs indicate that windshields are ineffectual:
Wet upholstery or carpets;
The odor of the moisture;
Mildew or mold inside the car;
Fogged up windows;
Rusty spots on the dashboard;
Condensation on the inside of the windshield on a cold day.
If you ignore warning signs of a windshield leaking, you may have to face electronic failures in your car. If the windshield leak reaches the ADAS sensors, they can also fail. As a result, it is crucial to take care of any potential problems with your windshield before they become serious.
While several options are available to repair a leaking windshield, it’s important to know what NOT to do when facing this problem. Do NOT use sealants or silicone on your car if they’re not designed for vehicle windshields. They may contract in the cold and expand in hot, making the problem much worse instead of better!
Once you identify the source of the leak, it will be much easier to manage the problem. Depending on the type of leak, you can use the following methods to fix the problem:
This windshield leak repair is viable when you have a rusted windshield frame, urethane glue has deteriorated, or it wasn’t appropriately applied during windshield installation. This type of repair is also reasonably cheap. You can buy this type of silicone anywhere between 5$ and 20$ per pack on Amazon. Usually, 1 pack is more than enough.
The DIY windshield repair kit is available at any auto shop or online. They cost around 10$-15$. The kit usually contains a plastic pedestal, plastic syringe, curing film, razor blade, and resin that is used to fill in the crack or chip. After the resin has been applied, it needs to be cured in sunlight or hardened using ultraviolet light.
Once the resin has been cured, it will effectively seal the chip, preventing water from seeping into the car. In most cases, the repairs are virtually invisible. However, if the damage is extensive, it may be necessary to replace the windshield.
If the crack is deep enough, it can weaken the windshield’s structure and cause it to break in the event of an car accident.
DIY repair kits are not designed to repair deep cracks, so they will not provide a long-term solution. You’ll likely be left with the situation where water is still seeping through the crack after windshield leak repair.
The best option is to contact a professional auto glass technician to fix the crack, if possible. If the crack is too severe, the entire windshield must be replaced. Either way, taking care of a cracked windshield as soon as possible is essential to ensure your safety on the road.
If you decide to replace your windshield, you can request a free quote on our website.
US Auto Glass connects you with experienced technicians in our network who can safely replace your car’s windshield.
They use modern equipment to make sure the new glass fits your car, and our network can source a wide range of auto glass. So whether you need a new windshield or a door window, request a free quote and a local technician gets back to you with a price.
While it might seem like a daunting task, fixing a leaky windshield is actually not that difficult. You just need to have the right tools and know-how.
In this article, we’ve outlined three methods for how to fix a windshield leak – one for holes in windshield glue, one for stone chips, and one for deep cracks. If you experience a leaking windshield, don’t panic! There are solutions out there that will work for you.
And if you don’t feel comfortable doing the repairs yourself, US Auto Glass is always here to help. Have you tried any of these methods to fix your own leaky windshield?
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