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How to Seal a Car Window

Car windows that are not sealed properly may allow wind and rain to leak through. This can cause extensive damage to the interior of the vehicle over time. Old seals that are torn or loose can be removed and replaced easily. Adding a layer of sealant to the window helps add more protection.

Items Needed:



  • Sharp Object

  • Alcohol

  • Cotton swab

  • Sealant

  • Rags

  • Window seals



  1. Locate the old window seals. They will look like black strips of vinyl that trim each window. Find the end of one of the strips and pull it up. You may need to use a sharp or pointed object to pry it. Pull on the strip to remove it from the window. A new strip will start in the corner of each side of a window. Remove and dispose of each one.

  2. Use alcohol and a cotton swab to clean the area around the window where the seals were located. Remove any dried-on or sticky debris. Allow the alcohol to dry completely.

  3. Roll up the window as tightly as possible. Place the tip of the sealant tube inside one of the window channels, and squeeze the tube to apply the sealant to the channel. Move the tube slowly along the entire channel, filling it entirely. Use a cloth to wipe away any excess sealant from the window.

  4. Purchase new window seals from your local auto parts store. Place the new seals around the window in the same location as the old ones. The ends of each seal will fit underneath each window channel. You may need to trim the new seals to fit the shape of your window.