Sewn bellows are manufactured from heavy-duty elastomer-coated fabric stitched with nylon or specialty thread. A liquid coating can be added to seams to extend life in severe applications by reducing the thread exposure to the environment or to limit moisture leakage. Sewn bellows are available in virtually any size or shape (round, oval, rectangular, strip-type, way cover, etc.) – without tooling charges. They are constructed with a wide variety of materials, chosen to match the application environment.