To the best of my knowledge this is the strongest most slip resistant knot to reasonably tie. It It is for both fresh and saltwater. There are some spot glues to use on flurocarbon to assure non slippage under extreme stress ( ie Tuna fishing with a flurocarbon leader).
If tyed correctly and glued with the correct glue on flurocarbon this knot will not slip loose or pinch brake on mono, flurocarbon or braid. All knots are subject to nick cut breaks but this knot is more resistant than most. Go through the eye twice; tie what is now called a Uni-knot with at least 5 pass throughs ( I typically use seven ), carefully rotate to remove any twists in the line, moisten the line and slowly tighten. Make sure the second loop isn't caught up in the hook eye slot or the split ring gap before final tightening. It sounds more complicated than it is; and this allows double lines completely throughout the knot. Per Dupont Stren R&D thirty something years ago. Ande R&D also confirmed this knot back then for all Nylon 6-6 applications.
