I tried vanish when it first came out and found it was terrible.In a pinch and for lack of a better option I picked up a small spool in 6 pound to use for leader in front of 10 pound power pro for trout fishing alpine lakes. That stuff won't hold a knot.. i tried every union knot I know.. fg, Albright, double uni, and blood knot.. kept casting off thr damn leader. Not a rod or guide issue.. ane I've had success with this setup with other lines. Vanish still makes lures vanish.