Northern Technologies International Corp, or NTIC is a United States-based firm that develops and markets environmentally beneficial products and services world-wide either directly or through a network of joint ventures, distributors, and agents. It operates through two segments which include ZERUST products and services and Nature-Tec products. Its main business is providing corrosion prevention solutions that are marketed under the ZERUST brand. The company also sells a portfolio of bio-based and biodegradable (compostable) polymer resin compounds and finished products marketed under the Nature-Tec brand. The ZERUST brand generates a vast majority of the revenue for the company.