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Headquartered in South Plainfield,N.J., Superseal Manufacturing, Inc. has been producing and delivering quality windows and patio doors for over 40 years. The company has offices in New Jersey, New York and, Massachusetts and has been on the rise as one of the Northeast leading vinyl window and patio door manufacturers. Superseal is a high-volume producer of higher-than-usual quality products with exceptional customer service and support at competitive prices.