It specializes in cleaning and maintenance products for industrial, institutional, food and beverage, vehicle care, and retail customers.

[3][4] In 2001, as a result of suppressed earnings and a weakening economy, NSI spun off its chemical and lighting divisions into their own publicly-traded company.

[8][9][10] A 2014 fire at an Amrep manufacturing plant in Marietta, Georgia resurfaced a history of safety and environmental issues at the facility extending back to at least 1989, long before Zep acquired the company.

However, the Georgia Environmental Protection Division determined that a fish kill in Sope Creek downstream from the facility was likely the result of runoff chemicals and firefighting foam.

[14] In July 2017, the company added a business segment for the food and beverage industry to its portfolio of products via the acquisition of AFCO.

The company is headquartered in Atlanta, Georgia, and maintains selling and market organizations in North America, the United Kingdom, Italy, and Benelux.

[18][19] Much like the original vehicle care program, Zep advertises the expanded Assure Program as making cleaning and sanitation management easier and safer for participating organizations by providing approved cleaning products along with consultation and training services for businesses to properly implement their use.

The plan also sent experts to give hand hygiene presentations and provided posters and other educational and informational material for use within the schools.