Zap A Gap CA is a great all purpose superglue for all flies. Easy to work with and a medium viscosity formula makes it great on everything and is the most popular all purpose adhesive for all fly tying purposes! The brush applicator option makes it super easy to apply. Superior gap filling formulaMedium viscosityAllow approximately 7 to 10 seconds for part positioningAverage of 20 seconds for curingWorks on oily surfaces