Apparently, it goes on as a thick, gooey liquid. It remains a liquid — so you can shape it to your liking — until you cure it with UV light. The included UV LED mini-light supposedly hardens it in 4 seconds.
You can then proceed to sanding and painting immediately afterwards.
Dab of glue, place the line, zap of light & line is anchored. Pull tight to tie-off point. Dab of glue, zap of light, line is affixed. No waiting for glue to dry/harden.