Northern Technologies International Corporation, together with its subsidiaries, develops and markets rust and corrosion inhibiting products in China, Brazil, India, the United States, and internationally. It operates through ZERUST and Natur-Tec segments. The company offers rust and corrosion inhibiting products, such as plastic and paper packaging, liquids, coatings, rust removers, cleaners, diffusers, and engineered solutions designed for the oil and gas industry under the ZERUST brand. It also provides a portfolio of bio-based and certified compostable polymer resin compounds under the Natur-Tec brand; and finished products, such as trash bags, agricultural films, and single-use disposable products under the Natur-Bag brand. In addition, the company offers on-site and technical consulting for rust and corrosion prevention issues. It sells its products and services to the automotive, general industrial, mechanical, mining, agricultural, retail consumer, and oil and gas markets through direct sales force, network of independent distributors and agents, manufacturer's sales representatives, joint ventures, and strategic partners. Northern Technologies International Corporation was incorporated in 1970 and is headquartered in Circle Pines, Minnesota.