The concept of cleaning without water has been around for quite some time.  Most people use a dry cleaners for their cloths.  Molecular manipulation is fast becoming the answer to cleaning other surfaces as well with the chemistry processes of Adsorption, (different then absorption) Emulsification and Bio-remediation to clean heavy traffic oil on concrete and asphalt.

The environment just can't take any more contaminants being pressure washed into the storm water system, hence the  EPA's Clean Water Act.  If your facilities need a waterless concrete cleaner or your customers are in fear of a fine by their StateWater Agency then check out Bio-Dry.  Bio-Dry has been patented because of its unique compounding and remains the best answer for a concrete cleaning solution.