Today, it is no longer unusual for UV resins of various viscosities to be used to tie popular tungsten and traditional nymph patterns for fishing on rivers and lakes, "epoxy" buzzers designed mainly for fishing on still waters, but also all kinds of wet flies, lures, small streamers, egg imitations (Egg Flies), saltwater crabs, shrimps and many other types of artificial flies.
"Viscosity test" for specific and nowadays most popular - the most used UV varnishes and glues. 10 seconds for each similarly large drop of UV varnish in a 90 ° slope.
Head Cement makes a perfect choice when tying small flies, flies with hackle, or flies with a dubbing body. Additionally, I try to avoid super glue with any soft, feathery flies. A good head cement will protect your thread, without wicking into unintended materials on the rest of your fly.