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Bifold Door Seal Replacement Bifold doors are a popular choice for garages, hangars and industrial spaces due to their efficient use of space and swift access. Making sure they are sealed properly is vital to ensure energy efficiency, cleanliness and a comfortable indoor environment. Gaskets can become flat, shrink or break down over time. This can cause water ingress and draughts, as well as loss of heat. Fortunately, fixing this is quick and easy. Seals on Top O