Hydrostop permanently treats new flies with a floatant. Coming in a conveniently large container hundreds of flies can be treated, dozens at a time. Flies allowed to soak for 5 minutes and then dried overnight will float higher when they are used. Perfect for yarn-type indicators as well as pre-treating dubbing.
Remove cap. Fill container with dry flies, indicators, etc. Let soak for 5 minutes. Remove flies, indicator, etc and let dry overnight.
I treat every one of my dry flies with when I 'm tying. Floats the fly forever! Also works well on treating the tips of older floating lines. Love it, just love it.