Amway makes a product called L.O.C. It is somewhat of a detergent, However, it has been sold as a product that "makes water, wetter". It has been added (as I have been told) to chemicals in crop dusters. It allows the chemicals to spread over the leaves, giving greater surface area of coverage because of loss of surface tension.
Product: L.O.C.™ Multi-Purpose Cleaner (click "Ingredients") and MSDS