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Bifold Door Seal Repair Bifold doors incorporate door panels into concertinaed tracks to let you open and close an area. In time they can have a few issues that require expert assistance. Inadequate maintenance could cause your bifold door to become jammed, resulting in hardware problems and doors that are stuck. To prevent this from happening it is recommended to grease your bifold doors every few weeks. Seals that are becoming less durable Seals on bifol