I saw this technique several years ago at the Fly Tying Expo in Albany, Oregon. Here is a how to video on using Gorilla glue to form fly pattern bodies that float. I have yet to try this. I think about it, then forget to buy the glue when I am grabbing other items in a hardware store. How To-Step by Step

Photography-Fly Tying-Video-Gorilla Glue Bodies-SwittersB