I spent a little time online today looking into the issue of desiccants and/or floatants. If I understand these issues, fumed silica is a floatant, like Frog's Fanny. There are also powders products that also contain both a floatant and a dessicant (silica gel), like Top Ride and Shimizake Dry Shake. I also found a recipe for a combination product that can be made from fumed silica and silica gel. The recipe is on another board, but can be found by searching for "dry shake flower drying silica gel michaels addicts."