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Bifold Door Seal Replacement It is important to maintain the temperature control, energy efficiency, and overall quality of the space by sealing bifold doors in a proper manner. Like any other door system they are susceptible to issues. Over time, the rubber gasket seal may flatten, become harder or brittle, and reduce its ability to block drafts. This can be easily fixed by replacing the seal with this kit. Frame Bifold doors let in a lot of light and open up a s