How to Clean and Protect Car Window Rubber Seals with Silicone Lubricant


In older cars, with time, rubber seals around the windows and doors start to deteriorate. Often, the seal loosens and air gets trapped inside. Slowly, the entire seal starts to unravel and hangs down by the corner. Sometimes, it breaks apart from the middle, giving your car an untidy look. This causes noise, water and dust to enter the car. This is probably the reason why you constantly feel a slight draft in your car and hear excessive noises. You may need to replace rubber seals on car windows.

In such a scenario, often people squirt a little glue and stick the seal right back into the frame. The solution to this problem is not the glue but the seal itself. The rubber seal is fixed into place with a small amount of glue and by applying simple pressure. Difficulty arises when the seal is no longer in the same shape, when it was attached to the window the first time. As the seal gets older, it shrinks in size and starts to pull away. This is the reason why the seal won’t fix back into place with glue. However, there’s another way to fix your car’s window seal on your own. You can easily replace the rubber seal on your own and use the WD-40 Specialist silicone lubricant to ensure that the rubber lasts for a long time.

Following is a step-by-step guide on how to remove your car’s window rubber seal and replace it with a new one.

How to Clean and Protect Car Window Rubber Seals with Silicone Lubricant

Things you will need:

  • Flathead Screwdriver
  • Sandpaper
  • Adhesive Glue
  • Rubber Seal
  • WD-40 Multi Use Product
  • WD-40 Specialist Silicone Lubricant


Step 1 : Remove the Rubber with a Flathead Screwdriver

How to Clean and Protect Car Window Rubber Seals with Silicone LubricantStart with the windows by opening your car door, so that you have more room to move around. 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 in your hands, so start scrapping again. Make sure that every piece of rubber has been removed, so that the next step gives the seals a clean finish.



Step 2 : Scrub the Glue with WD-40 Multi-Purpose Product

There still might 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. This lubricant has been specifically created to clean all kinds of surfaces and prevents moisture from setting in. After applying the lubricant, use a rag to rub the surface. Apply the lubricant one more time and rub it vigorously until you feel the metal is clean enough. Wipe of any remaining residue with paper towels.


Step 3 : Sand the Metal

To provide the adhesive a clean and even surface so that the rubber sticks properly, the next step is to sand the metal thoroughly. Use a fine-grit sandpaper and start rubbing in circles. Try keeping your movements on the seals or you might ruin your car’s appearance. This step allows you to create a surface that is free of lumps and smooth enough that the rubber settles in the seals flawlessly.


Step 4 : Apply New Adhesive

How to Clean and Protect Car Window Rubber Seals with Silicone LubricantA weather stripping adhesive is used to bond rubber with metal. Before laying down the adhesive in the seals, cut the rubber 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.



Step 5 : Put in the New Rubber Seals

Give the adhesive five to ten minutes to become a little hard and then, start laying down the rubber from the corner and gently move your way to the other corner by putting slight pressure. Make sure that there are no gaps in between, and don’t stretch the rubber.

Once the rubber is in place, press down on the entire strip once again to ensure that the rubber has bonded firmly to the metal.


Step 6 : Give the Rubber a Layer of Protection with WD-40 Specialist Silicone Lubricant

When you are done applying the rubber seal, it’s time to make sure that it won’t corrode easily as the last one did. WD-40 Specialist silicone lubricant helps keep rubber components safe. The lubricant can withstand temperature from -35°C to +200°C. The lubricant protects rubber parts from attracting dust and prevents moisture.

Give the rubber seals at least an hour to settle properly and 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’s seals soft and firm for a long time.

How to Clean and Protect Car Window Rubber Seals with Silicone Lubricant

Mistakes to Avoid When Changing Window Seals

  • Some cars have plastic inserts in the door that has pins. Without any proper lubrication, these pins corrode easily and are what makes the rubber loose. So, don’t forget to replace these pins
  • Most rubber seals are in L shape and need to be placed with the bigger surface facing in (this prevents water from coming inside the car)
  • Do not close the doors immediately after applying the rubber seals. Give it at least an hour before taking out the car for a drive
  • Do not use a screwdriver to press in the rubber. A windscreen fitter tool will do a much better job, as it is pointy end easily fits between the rubber and the frame

Follow these six steps and you can easily replace your car’s windows and doors rubber seal without paying hundreds of dollars. The WD-40 Specialist silicone lubricant will keep the rubber in place and protect it from dust. With a single coat of this lubricant, you don’t have to worry about any damage for six months.




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