This resin/flashlight kit is a great way to break into UV curing for a great price. Bone Dry Clear, probably our most popular fly tie resin is packaged with a powerful little UV flashlight that has ample output in exactly the right wavelength to cure the resin in less than 10 seconds. It uses one common, inexpensive AAA battery. Bone Dry Clear is a clear, non-yellowing, very low viscosity shellac-like resin that is perfect for penetrating fibers, putting clear, glossy coats on heads, carapaces, thorax, fixing wraps and a multitude more uses.