Northern Technologies International Corporation Provides Earnings Guidance for the Fourth Quarter of Fiscal 2021

Northern Technologies International Corporation develops and markets environmentally beneficial products and services in over 65 countries. The Company's primary business is corrosion prevention, marketed mainly under the ZERUST brand. The Company has been selling its proprietary ZERUST rust and corrosion inhibiting products and services to the automotive, electronics, electrical, mechanical, military, retail consumer, and oil and gas markets. It offers worldwide on-site technical consulting for rust and corrosion prevention issues. Its technical service consultants work directly with the end users of its products to analyze their specific needs and develop systems to meet their technical requirements. It also markets and sells a portfolio of bio-based and biodegradable polymer resin compounds and finished products marketed under the Natur-Tec brand. Its ZERUST rust and corrosion inhibiting products include plastic and paper packaging, liquids, coatings, rust removers and cleaners.