In the year 1972, Gunnar and Ivar Kjellin established Katoplast. The founders' wives Ka(ri) and To(ve), who became known as Katoplast, are the source of the name. The company got its start in Gunnar's garage with just the proprietors as employees.

Over the years, the company has relocated multiple times, each time to greater spaces. Own premises were decided to be built in Tistedal in 1983, and these were prepared for occupancy in the fall of 1984. There has been a need for more developments since then.

Today, Laila and Trond Vidar Kjellin are the owners and managers of the business. Since 2011, Trond Vidar has served as general manager.

Since then, significant investments have been made, and the machine park now has energy-efficient