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Bifold Door Seal Replacement Bifold doors are a favorite choice for garages, hangars and other industrial spaces because of their efficiency in utilizing space and quick access. It is essential to keep them sealed to ensure the sake of energy efficiency, cleanliness and a relaxing atmosphere. Gaskets can become flat, shrink, or become damaged over time. This leads to water ingress and draughts, as well as loss of heat. This is a simple and quick fix. Seals on Top Over time, the rubber seals on a b