Everything you need to know regarding silicone sealant used for windshield

It is not uncommon to discover water seepage inside a vehicle. The underlying cause, however, is frequently the car’s windshield. Is your car’s windshield leaking, but you can’t see any visible cracks or chips? Do you have a minor fissure that is constantly filling with water? If your answer is yes to any of these questions, then a silicone sealant could be a quick solution.

Sealants must be waterproof and resistant to harsh climatic conditions, temperatures, and vibrations. The best sealants to use are butyral, acrylic, polyurethane, and silicone sealants because they are flexible, durable, and easy to apply. Some may take several hours to dry, while others may dry in a matter of minutes. Make sure the sealant does not become brittle after drying, as this will reduce its flexibility. Another thing to keep an eye out for is the colour scheme. After drying, some sealants turn an unappealing yellow or dirty white, and you don’t want your car to appear dirty, so make sure the sealant doesn’t have this tendency.

What exactly is a Windshield Sealant?

A sealant, as the name implies, fills minor cracks around the edge of a windscreen gasket. When scheduling an appointment for automotive windshield repair, make sure to inquire about the type of sealant used. All glass sealants are waterproof and resistant to extreme temperatures, weather, and vibrations.

These gel-like sealants are designed to flow into cracks between the windshield and gasket to form a strong seal. You’re probably wondering how a sealant gets to the bottom of a chip. Because these chemicals are fairly liquid, an expert drops the sealant at the top of the window and allows gravity to do the rest, smearing and spreading it along the length of the fissure. It seals up all the holes and crevices that could potentially absorb water as it passes along a drain.

After application, the silicone sealant used for windshield is allowed to dry until it is completely clear, allowing for unobstructed vision. If applied correctly, the sealant will bond to the glass and keep the structure together for an extended period of time.

Problems Silicone Sealant for Windshield Can Address

Silicone Sealant can be used to repair small cracks in a windshield that could cause it to leak.

Some cars have a larger gap between the body frame and the windshield. Water can enter this gap and freeze, causing the gasket and adhesive inside to become brittle and crack over time. This is how leakage form around the windshield’s edge.

A leaky windshield is indicated by condensation on the glass or water inside the car during or after a trip to the carwash, or by particularly heavy rains. Rust on older cars can also indicate that water is getting in between the car frame and the rubber seal that keeps the glass in place. If you’ve noticed any of these issues, silicone sealant is the solution. 

Why is a sealant a must for windshields?

Leaks in windows and windshields are fairly common. Leaks in your car can cause a variety of issues, including wet seats and floors, as well as rust, which can cause permanent damage. Another critical factor to consider is mold growth, which, if not addressed immediately, can lead to serious health problems.

So, the leak should be repaired as soon as possible using windshield sealant.

Make sure you understand what you have to do before applying the sealant.

  • Find the source of the leak first.
  • Second, use tape to shield the surrounding area.
  • Apply the sealant to the leaking hole with your fingers and smooth it out.
  • Allow it to dry.
  • You can remove the tape once it has completely dried.
  • A little alcohol can be used to clean up any residue.

How to apply silicone sealant to the windshield?

First, if you are unsure where the water is entering, you must locate the leak. Go around the edge of the windshield and gasket with a garden hose, testing small areas and looking for signs of water.

Then, while working, use a thick roll of tape to protect the windshield and car paint. Wrap the tape around the glass’s edge and the car frame. Take your time with this one. Take care to precisely align the tape, covering the glass and frame but not the gap or gasket.

If there are any visible signs of corrosion or rust near the leak, you should treat it. It should be sanded and cleaned to temporarily solve the rust problem. Then, to neutralize the rust and touch up the paint, a small area paint repair kit could be used. Follow the silicone sealant manufacturers’ instructions and apply as many coats of rust spray and paint as needed. After that, a clear coat should be applied and allowed to dry overnight.

Reduce the flow of silicone gel by cutting the tip of the windshield and glass sealant tube at an angle.

Insert the now-open tip into the leaky gap in the windshield. Squeeze the tube gently and fill the gap with sealant until the gel is level with the windshield glass and frame.

Make a straight line that encompasses the entire problem area.

Run your finger along the gap to smooth out the silicone sealant used for windshield you’ve applied. As the gel settles and dries, it will continue to flow into the crack.

Allow 10-15 minutes for the windshield glass sealant to dry. Then, carefully peel the tape away from the glass and windshield frame. It’s critical to remove all of the tapes before the silicone dries completely.

Use alcohol and a clean rag, and remove any windshield glass sealant from the vehicle. If any excess has dried on the windshield glass, use a razor blade to carefully scrape it away.

Allow this automative silicone sealant to dry overnight before exposing it to rainy or hot weather.

How can Bondzil help?

 Bondzil is one of India’s leading silicone sealant manufacturers, offering a wide range of high-performance sealants for everyday use. For all our products there is extensive research involved, which is supported by technology and innovation. 

Bondzil’s HYB category is the best automotive silicone sealant. It has a high-quality, one-component, hybrid neutral, elastic adhesive-sealant with fast strength build-up based on SMP (Silyl-modified polymers) technology that is solvent-free and isocyanate-free. They also combine polyurethane strength with silicone weathering resistance.



No Cracking

Remains Elastic Forever

Super Leakage Control


Water & Weather Proof

There are 3 types of Bondzil’s HYB category silicone sealant used for windshield

  • HYB Clear Silicone Sealant:

Crystal clear, easy tooling, and excellent finish

  • HYB Quik Silicone Sealant:

Very high final strength and good extrudability

  • HYB HT Silicone Sealant

Fast curing, UV and weather resistant, odourless

We are always here with the best sealant solutions. Not just a windshield, but multiple-purpose silicone sealants. To know more, get in touch with our support team today.