Gehrke's Gink Floatant is one of the most popular fly floatants around. Gehrke's Gink will keep your fly on the surface. It comes in a handy dispenser and works well in cold weather. Available: 1/2-oz. bottle.
This floatant has always worked for me. It works best if applied before the fly gets wet. Have caught many finicky fish using this. This last summer it helped me catch a nice 18-1/2" rainbow that was only feeding on spinner flies floating on the surface. Have used other floatants but like this one the best.