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Bifold Door Seal Replacement It is essential to ensure the control of temperature, energy efficiency, and quality of the room by keeping bifold doors sealed properly. Like any other door system they may have issues. The gasket seal's rubber material can become hard, flatten or become brittle with time, reducing the ability to stop draughts. This can be easily fixed by replacing the seal with this kit. Frame Bifold doors are ideal to let in lots of natural light while making a ro