The Ultimate Mono Vs Fluoro Knot Strength Test (Final Results)
- By: Luke Simonds
- on September 3, 2021

It’s knot strength time!
We’ve been testing the abrasion and the knot strength of monofilament and fluorocarbon.
And there have been some serious surprises so far!
Check out the knot strength test for monofilament versus fluorocarbon line below!
Mono Vs Fluoro Knot Strength Contest [VIDEO]
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In this knot strength test, I used the non-slip loop knot to a swivel that is wetted in water prior to the test.
And the results are in!
If you want to try out these lines for yourself, you can get them from our online tackle shop here:
Here are the full results of this test:


So the Seaguar Blue Label Fluorocarbon line was the winner!
Going from Vanish to Seaguar will increase your knot strength by 20% and if you jump from 15# Ande Mono to 20# Seaguar Fluoro, you’ll increase your knot strength by 9%.
I’m still sticking with Ande Monofilament for many reasons:
- More affordable
- More abrasion resistant
- Only a slight difference in knot strength
Here are the full results of the abrasion test:
Shocking Results! New Mono vs Fluoro Line Abrasion Contest
And the visibility test is coming up next!!
Do you have any line and knot combinations you’d like me to compare?
Let me know down in the comments!
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The problem with Ande is that it has very low Tensil Strength.
It does knot well but there are much stronger lines for the same diameter available.
ANOTHER GOOD POINT WITH DRY KNOT IS YOU ARE NOT LEAVING YOUR SCENT ON OR NEAR THE LURE, SCENT MATTERS !
Very true
Back to the same old same old.
All lines should have a 24 hour soak in fresh or salt water as relevent.
In the past, this soak has made a huge difference.
Concerned that the knots are cutting themselves. If at all possible use little crimps. Metal to mono should always be the failure point.
Is there a reason why you haven’t tested the ANDE fluorocarbon leader? The ANDE fluorocarbon leader is less expensive than the Seaguar. Just curious since you carry the ANDE monofilament leader. Thanks.
I have used that line, but never did any detailed tests on it. I’ll make sure to pick up a spool on my next shopping spree.
Far and away the best practical information on any site on the internet.
Thank you all.
Thanks so much for making time to post the nice comment Kerry!
Thanks Luke, I have been wondering about that , afraid to use the loop knot, for fear of losing a good fish!!
If the drag is set properly, the knot should never fail when fighting a fish unless the fish wears through the line.
Just far a giggle, I would like to see results with a 20# Ande. I know it’s larger diameter but usually I’m buying the poundage not the diameter.
The 20# Ande would definitely beat the 20# Blue Label… I did some testing on those two lines a while back and the mono won.
Thanks Luke, Very much appreciated, been watching these results closely. Great job.
Thanks Randal!
Great work Luke! Thanks for sharing all your testing. It is very helpful in answering questions we probably all have about fluorcarbon vs mono. Your results helps us refine our fishing tactics and technics. I suspect tying all those knots for testing gets a bit old at times but hey you’re getting a lot of practice! Thanks.
Thanks for making time to post the nice comment Don! Yes, tying the knots and breaking them gets pretty boring. But it sure has been fun to finally know exactly which knots and lines perform better than others, so I’ll continue to run tests like these going forward.
Thanks, Luke. I’ve lost more fish to leader abrasion than breakage of my loop knots. In fact, when a lure is stuck, I appreciate being able to break off deliberately at the hook. For those reasons alone, mono seems the better compromise. Add price and it’s hard to justify fluorocarbon.
Thanks for sharing the helpful intel