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Bifold Door Seal Replacement Due to their compact design and easy access bifold doors are popular for hangars, garages, and other industrial spaces. It is essential to keep them sealed to ensure energy efficiency, cleanliness, and a relaxing environment. As time passes, gaskets become flat and shrink or are damaged, leading to draughts, water ingress and heat loss. Fortunately, fixing this is easy and quick. Seals on Top Over time the seals made of rubber on a bifold can get damaged or flat