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Bifold Door Seal Replacement Maintaining the proper seal of bifold doors is vital to ensure climate control, energy efficiency and the overall quality of the space. But, like any door system they can be subject to problems at times. Over time, the gasket seal could become flattened, become harder or brittle and less able to stop drafts. This can be easily fixed using this seal replacement kit. Frame Bifold doors are ideal for letting in lots of natural light and makin