Zap-A-Gap with a brush! Spread it over large areas with ease or work it into nooks and crannies. When finishing off a fly, try brushing some on your thread and simply wrap a few more wraps on the head and you won’t need to tie a knot to finish off the fly. A must for your fly tying materials. if you are looking to glues eyes to deer hair or wool we recommend using the Zap A Gap Gel formula.