Farmers will not likely find a drought-protection product that works – other than rain. If you hear of any rescue products (we don’t know of any that are proven), you may want to put it through your own in-field trial. Leave check strips and take them to yield to see if the product provided an adequate return on investment. It may take a few years of these on-farm trials to build a level of experience sufficient to determine whether a product works or to discover the conditions under which it works.
With drought, the best moves are pre-emptive to set up the crop for the best possible establishment and growth in a broad range of conditions. This is more about planning for next year, but you can find weather-proofing tips for drought and more in this article.