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Bifold Door Seal Replacement It is essential to ensure the temperature control as well as the energy efficiency and overall quality of the space by sealing bifold doors correctly. However, just like any other door, they could be susceptible to issues at times. The rubber gasket seal may become brittle, harden or become brittle with time, which reduces the ability to stop draughts. This can be easily repaired using this seal replacement kit. Frame Bifold doors are great for letting in plenty of light and making a room