Walls and Ceilings News Sto acquires Dyckerhoff AG January 20, 2002 Sto announced the addition of key product lines from Dyckerhoff AG ...Sto AG, the parent company of Sto Corp., announced the addition of key facade product lines from Dyckerhoff AG, based in Wiesbaden, Germany. Share This Story You must login or register in order to post a comment. Report Abusive Comment Thank you for helping us to improve our forums. Is this comment offensive? Please tell us why.