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Bifold Door Seal Replacement Bifold doors are a common option for garages, hangars and other industrial spaces because of their efficient use of space and swift access. It is essential to keep them sealed for energy efficiency, cleanliness and a pleasant atmosphere. Gaskets can become flat, shrink or break down over time. This leads to water ingress and draughts as well as loss of heat. This is a simple and quick fix. Seals on the top Over time the seals made of rubber on a bif