How to Install the Rubber on Glass House Windows

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Broken seals along a window pane and frame allow heat to escape in the winter and cool air to escape in the summer. Air leaks can cause windows to fog or frost on a regular basis. For older style homes, a rubber seal may sit between the aluminum window frame and cabin top, or upper frame enclosure. Installing a new rubber seal can help prolong a window’s usefulness and save money in window replacement costs.

Things You'll Need

  • Needle-nose pliers
  • Razor blade
  • Acetone
  • Butyl rubber seal
  • Remove the window and frame from its enclosure. Different style windows use sill latches or pulley systems, so removal methods may vary.

  • Scrape and clean off glue or mastic materials from the aluminum frame and from the top of the window enclosure. Use VC thinner or acetone in hard to clean areas.

  • Pull off the old rubber seal with a pair of needle-nose pliers. Scrape off any remaining rubber and glue materials from the aluminum frame and cabin using a razor blade.

  • Draw a pencil line across the cabin top to mark where the frame fits for when it comes time to reinstall the frame.

  • Lay the butyl rubber seal across the backside of the aluminum frame. The seal should span across the top, sides and bottom of the frame so the two ends form a tight, snug fit at the bottom. Avoid stretching out the rubber seal in the process.

  • Reinstall the window.

Tips & Warnings

  • Make sure no bends or dents exist on the aluminum frame, as these will cause air leaks to form again.
  • Wear goggles and rubber gloves when using acetone or VC thinner as a safety precaution.

References

  • Photo Credit Michael Blann/Digital Vision/Getty Images
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