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Bifold Door Seal Replacement Maintaining the proper seal of bifold doors is essential to maintaining energy efficiency, climate control and the quality of the space. Like any other door system, they can have problems. Over time, the rubber gasket seal could become flattened or become brittle, harder, and reduce its ability to impede drafts. This can be easily fixed using this seal replacement kit. Frame Bifold doors let in a lot of light and can ope