75 years ago, Ben and Pauline Rassieur rented a storefront near downtown St. Louis and decided to try to make a go of a business they weren’t sure would succeed.

Today, Paulo is a premier heat treater serving customers across North America. With five plants in operation and a sixth on the way, the venture is an unquestionable success.

This success would not have been possible without the dedication of our employees past and present. We salute those who brought us 75 years of good fortune as well as those who will lead us forward.

1940s

Ben and Pauline Rassieur found Paulo Products Company in 1943, offering heat treating services using homemade salt baths and second-hand tempering furnaces out of a rented space at 2907 Washington Ave. in St. Louis. In 1948, the company builds its first plant at 5711 W. Park Ave. in St. Louis, which still stands.

2017

Paulo begins construction on its first international division, a 50,000-square-foot heat treatment plant in Monterrey, Mexico. With the potential to expand to 110,000 square feet, the plant will initially serve the automotive industry and is positioned to serve agricultural, aerospace and other industrial providers in the future.

Batch Heat Treating