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Bifold Door Seal Replacement Making sure that bifold doors are properly sealed is essential to maintaining the control of temperature, energy efficiency and the quality of the space. Like all door systems they may have issues. Over time, the gasket seal could become flattened and become brittle or harder and lose its ability to stop drafts. This can be easily fixed using this seal replacement kit. Frame Bifold doors are fantastic for letting in lots of natural light and opening up a room. They're also gre