Sto Corp., headquartered in Atlanta Georgia, is an innovative world leader and producer of a broad range of versatile cladding and coating systems for building construction, maintenance and restoration. Sto Corp. has achieved ISO 14001:2004 (Environmental Management) as well as ISO 9001:2008 certification at all of our North American locations, which are located strategically across North America to serve our more than 200 distributorships in the U.S. and Canada.