Loon Outdoors UV Clear Fly Finish - UV resins allow for infinite work time but cure within seconds when exposed to one of Loon's UV lights. The result: a perfect application with a durable, clean, and glossy finish. The different viscosities were developed to perform in different circumstances: UV Flow is the same viscosity as water and locks in threads as a head cement and provides a super-thin coating to heads, bodies or midges. UV Thin is viscous enough to build heads or wing cases, but thin enough to coat bodies on small, low-profile flies. New UV Blocking application needles New Taper-Tip needle prevents clogs Build fly heads and bodies Instantly cures with sunlight or UV light Brush applicator included Needle tip included for precision tying Available in 1/2 oz and 2 oz