How to Replace Rubber Window Seals: A Comprehensive Guide for Cars, Homes, and Beyond

Rubber window seals are essential components that ensure the proper functioning and longevity of windows in various applications, such as cars, homes, boats, and caravans. Over time, these seals can deteriorate due to exposure to the elements, leading to air leaks, noise, and moisture buildup. In this comprehensive guide, we’ll walk you through the process of replacing rubber window seals, whether you’re dealing with a car, a house, or any other type of window.

Removing the Old Rubber Window Seal

The first step in replacing a rubber window seal is to remove the old one. Here’s how to do it:

Start by locating the ends of the filler strip from your existing rubber window seal. Use a flathead screwdriver and begin slowly prying the rubber filler strip out, working your way around the window until the strip has been removed.
If you’re working on a car window, open the car door to give yourself more room to maneuver. With a flathead screwdriver, start removing the rubber from the place it is already falling apart. Gently ease the rubber out and then pull it with your hands. If the rubber is too soft, it will break into pieces, so start scraping again until every piece has been removed.
For windows in a house, use a putty knife or scraper to gently pry up one end of the old rubber seal, being careful not to damage the window frame. Once you have loosened one end, continue working your way around the window until the entire seal has been removed.

Cleaning the Window Frame

After removing the old rubber seal, it’s important to clean the window frame thoroughly to ensure proper adhesion of the new seal. Here’s how to do it:
There might still be some glue residue left behind in the seals, so start cleaning that first. You can use WD-40 multi-use spray to remove the glue. Apply the lubricant, use a rag to rub the surface, and then wipe off any remaining residue with paper towels.
To provide the adhesive a clean and even surface, sand the metal thoroughly using a fine-grit sandpaper. Rub in circles, keeping your movements on the seals to avoid ruining the car’s appearance. This step creates a smooth surface for the rubber to settle in the seals flawlessly.
For windows in a house, wipe around the edge of the window frame and check that no residue remains after removing the original sealant. If you have issues removing the seal, you can try using heat guns, hair dryers, acetone, or WD-40, but always check the material of the wall and the window frame is suitable before getting too involved with attacking stubborn sealant.

Applying the New Rubber Window Seal

Once the window frame is clean and ready, it’s time to apply the new rubber seal. Here’s how to do it:
Cut the rubber to size and dry fit it in the window. When you feel that with slight pressure, the rubber will sit nicely, only then apply the adhesive. Lay down a thin layer of adhesive in the seal and a bead of it inside the rubber.
Give the adhesive five to ten minutes to become a little hard, then start laying down the rubber from the corner and gently move your way to the other corner by putting slight pressure. Make sure there are no gaps in between, and don’t stretch the rubber.
For windows in a house, load the window sealant cartridge into the caulking gun, then cut the end at an angle. Apply sealant to the gap, working steadily from top to bottom on the sides and along the top or bottom. Once applied, press the pressure release catch on the caulking gun to prevent more product from oozing out.

Protecting the New Rubber Window Seal

After applying the new rubber seal, it’s important to protect it from deterioration and ensure its longevity. Here’s how to do it:
When you are done applying the rubber seal, it’s time to make sure that it won’t corrode easily. WD-40 Specialist silicone lubricant helps keep rubber components safe. The lubricant can withstand temperatures from -35°C to 200°C and protects rubber parts from attracting dust and preventing moisture.
Give the rubber seals at least an hour to settle properly, then apply the lubricant. Use the smart straw to cover the corners and the seams so that it penetrates deeply. A single coat of this silicone lubricant can keep your car’s window seals soft and firm for a long time.
For windows in a house, once the new sealant is applied, smooth it out using a putty knife or your fingers to ensure it is evenly distributed and adheres to the window and frame properly.
By following these steps, you can successfully replace rubber window seals in your car, home, or any other application, ensuring a tight, weatherproof seal that prevents air leaks, noise, and moisture buildup. Remember to always wear the appropriate personal protective equipment (PPE) when working with glass and to consult with a professional if you have any concerns or questions about the process.