Atlanta-based Zep Inc. (NYSE: ZEP) which makes and markets cleaning and maintenance services, will buy all of Ecolab Vehicle Care’s assets for $120 million.

The combined company will be called Zep Vehicle Care, and will provide car-care products and professional car washes, convenience stores and auto detailers.

Ecolab Vehicle Care, based in St. Paul, Minn., provides branded commercial cleaners for vehicle care.

Ecolab Vehicle Care is a division of Ecolab Inc. (NYSE: ECL). The companies expect the deal, which is subject to regulatory approval, to close in 2012.