Northern Technologies International Corporation develops and sells proprietary environmentally beneficial products through direct operations, subsidiaries, joint ventures, and distributors across over 65 countries. The company's core business comprises ZERUST® rust and corrosion inhibiting products and services marketed to automotive, industrial manufacturing, mining, agriculture, and energy sectors, along with Natur-Tec® bio-based and certified compostable polymer compounds designed for packaging and consumer goods applications. NTIC generates revenue through direct product sales upon shipment, majority and minority stakes in joint ventures that manufacture and distribute products in assigned geographic territories, and service fees to joint ventures, with earnings also derived from equity income and dividends from joint venture operations.