Why You Should Wet the Line Before Tightening a Knot

Almost every set of fishing knot instructions has the same small step near the end: wet the line before you pull the knot tight. It’s easy to skip, and most instructions never say why it’s there. This post explains what wetting actually does, in plain terms, along with one other point the knot guides agree on: the Improved Clinch knot isn’t meant for braided line.

Why Wet the Line Before Tightening a Knot

Pulling a knot tight makes heat

Rub your hands together fast and they get warm. That’s friction. When you cinch a knot, the line does the same thing: the wraps drag across each other and across the hook eye as they tighten down. That rubbing makes heat right inside the knot.

Heat is bad for fishing line. Knots3D puts it plainly: lubricating the knot “reduces friction as the knot is tightened, preventing heat buildup that can weaken the line.” It adds that this “is particularly important for monofilament and fluorocarbon lines, which can be damaged by the heat generated during knot tightening.”

Water makes the line slide instead of grab

Water works like oil in an engine. A thin wet film sits between the strands, so they slide over each other instead of grabbing. Less grabbing means less heat, which is the main reason to wet the line.

It also helps the knot finish forming. Knots3D says proper lubrication “allows the knot to cinch smoothly and evenly.” A dry knot can grab partway down and stop, looking tight when the wraps haven’t fully settled. Animated Knots gives the same two reasons: the knot should be moistened “to ensure the knot tightens smoothly, and to avoid generating heat.”

The knot is already the weak spot

Any knot weakens line. Animated Knots notes that testing shows mono with a knot in it “breaks at about 50% of its ideal strength.” With that much already lost at the knot, it makes sense to wet the line rather than lose more to heat or a badly seated knot.

How to Wet the Line

• Tie it neatly first: wraps lined up and not crossed over each other.
• Wet it: Animated Knots notes saliva is “probably used more than anything else.” Plain water works too, and it lists vegetable oil as “a better lubricant” when you have it.
• Pull slowly and steadily: let the wraps slide down and settle instead of jerking them tight.
• Check it: the knot should sit snug on the eye with neat wraps. Give it a firm pull before you trim the tag end.

If it doesn’t look right, cut it off and tie it again.

The Other View on Wetting

Not everyone thinks you need to wet the line. A FlyLife Magazine article calls the practice a myth carried over from the days of thicker, textured mono. It quotes a retired DuPont chemist who says, “It would be impossible to ‘burn’ today’s monofilament lines via seating an un-wetted knot.” His concern runs the other way: wet wraps can “slide over themselves,” producing what he calls a “liar knot,” one that “has not formed properly.”

Both sides agree on one thing: a knot only holds if it forms properly. Tying it neatly and pulling it down slowly reduces the risk of a liar knot, though he would still skip the water. Most knot guides, including NetKnots (“Wet knot and pull on tag end to tighten down the coils”), still include wetting as a standard step.

Don’t Tie an Improved Clinch Knot in Braid

The Improved Clinch is one of the most common knots for tying mono or fluorocarbon to a hook, lure or swivel. It holds because its wraps grip the main line as they tighten.

Braid is too slick for that. Cast and Spear explains that “braid does not bite into itself the same way mono does,” so “the Improved Clinch can slip on slick braided line.” NetKnots says it outright: “It is not recommended for braided line.”

The usual alternative is the Palomar. Cast and Spear says to “use a Palomar knot for braid,” and NetKnots calls it “the best knot to use with braided fishing line.” Step-by-step drawings for both knots are on the fishing knots page.

The Bottom Line

Wet the line before you pull a knot tight. It cuts friction and heat and lets the wraps settle evenly, and it costs two seconds. Tie the knot neatly first, because water won’t fix a sloppy one. And if you’re fishing braid, use a Palomar or another braid-friendly knot, not the Improved Clinch.

Sources

• Animated Knots, Fishing Knots: animatedknots.com/fishing-knots
• Knots3D, Blood Knot: knots3d.com/en/blood-knot
• FlyLife Magazine, on wetting knots: flylifemagazine.com/?p=14580
• NetKnots, Improved Clinch Knot: netknots.com/fishing_knots/improved-clinch-knot
• NetKnots, Palomar Knot: netknots.com/fishing_knots/palomar-knot
• Cast and Spear, Improved Clinch Knot: castandspear.com/improved-clinch-knot

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