Astonishing Nails Glue is a medium viscosity resin. It delivers excellent clarity and has great strength. You will have total control during your resin application with the Brush On Glue. It can be used to apply nail tips, but also to use it with either Fiberglass or Silk applications to saturate the mesh. The bottles are spill proof and the Brush On Glue has an improved non-clog brush.