Freshwater Fluorocarbon Line

The Leader That Disappears Underwater

Seaguar Gold Label Fluorocarbon Leader is engineered for situations where fish are leader-shy and every advantage matters. Built thinner and less visible underwater than any other fluorocarbon leader on the market, Gold Label gives you more natural presentations, better bait action, and higher catch rates on the fish that refuse everything else. From ultra-light trout rigs to heavy big game setups, it's available in 2lb through 150lb to cover every application.

Double-Structure Fluorocarbon — Built Different From the Inside Out

Seaguar's exclusive DSF (Double Structure Fluoro) process combines two custom fluorocarbon resins into a single leader with a smaller diameter core and a tougher outer layer. The result is a leader that's 18% thinner than standard fluorocarbon, 17% stronger in both knot and tensile strength, and significantly softer — so it cinches cleanly into fail-safe knots without the stiffness that causes slippage or breakage under pressure.

When Standard Fluorocarbon Costs You Fish

On pressured fisheries — clear water, finicky yellowtail, spooky white seabass, wary trout — leader visibility is often the difference between a bite and a refusal. Thicker, stiffer leaders kill bait action and flash in the water column. Gold Label's ultra-thin diameter and near-zero memory let your bait move freely and naturally, and its refractive index matches water so closely it effectively vanishes at depth.

Why Gold Label Outperforms Standard Fluorocarbon

• 18% thinner diameter — less visible, better bait action
• 17% better knot and tensile strength despite smaller diameter
• Lowest line memory of any fluorocarbon leader — easier to manage, fewer tangles
• Extremely soft and supple — cinches easily for clean, reliable knots
• 100% fluorocarbon — near-zero stretch, abrasion resistant, UV stable
• Level Wind Technology for consistent, even spooling
• 25-yard spool — right-sized for leader material use

The Right Pick If...

• You fish clear water where leader visibility costs you bites
• You need a leader that ties clean knots without stiffness or memory issues
• You're targeting finicky species that refuse heavier or more visible leaders
• You want one premium leader that covers light inshore to heavy offshore applications
• You trust Seaguar's fluorocarbon expertise — they invented it

Best Fishing Techniques

Ideal for live bait fishing, drop-shotting, finesse jigging, Carolina rigs, fly fishing tippet leaders, kite fishing, and any technique where leader invisibility and natural bait presentation are critical. Heavier sizes (50–150lb) are built for offshore big game, shark, and heavy inshore applications.

Best Conditions

Clear water, high-pressure fisheries, bright sunny days with high visibility, and any situation where fish are leader-shy or have been heavily targeted. Also excels in low-light conditions where the refractive index advantage keeps the leader invisible at depth.

Best For

• Yellowtail and white seabass on the California coast
• Tuna — both light tackle and heavy big game setups
• Trout and bass in clear freshwater lakes and rivers
• Calico bass and inshore saltwater species
• Surf fishing with finesse presentations
• Offshore billfish, shark, and heavy leader applications (80–150lb)

Key Features

• 18% thinner diameter than standard fluorocarbon
• 17% better knot and tensile strength
• Lowest line memory — DSF Double Structure Fluoro construction
• Extremely soft and supple for clean knot cinching
• 100% fluorocarbon — abrasion resistant, UV stable, near-zero stretch
• Level Wind Technology
• Spool length: 25 yards
• Available: 2lb through 150lb
• Vendor: Seaguar

Models & Specs

Tackle Express Tips

• Match the test to your mainline: A good rule of thumb is to run Gold Label at 2–3x your mainline test for most inshore and freshwater applications — the thinner diameter keeps it invisible while still providing the abrasion resistance you need near structure.
• Use a loop-to-loop or FG knot: Gold Label's low memory and soft construction make it ideal for the FG knot when connecting to braid — the supple material cinches tight without the stiffness that causes slippage in stiffer fluorocarbons.
• Store out of direct sunlight: Even though fluorocarbon is UV-stable, prolonged direct sun exposure on the spool can degrade the resin over time. Keep spools in a tackle bag or drawer between trips to maximize shelf life.

FAQ

What makes Gold Label different from standard Seaguar fluorocarbon?
Gold Label uses Seaguar's exclusive DSF (Double Structure Fluoro) process — two custom fluorocarbon resins combined into one leader. This gives it an 18% thinner diameter and 17% better strength than standard fluorocarbon at the same test rating, plus significantly lower memory for easier handling.

Which test should I choose for yellowtail and white seabass?
Most Southern California anglers run 20–40lb Gold Label for yellowtail depending on conditions, and 25–40lb for white seabass. In cleaner, clearer water, drop down a size — the thinner diameter will get you more bites on pressured fish.

Can I use Gold Label for freshwater applications?
Absolutely. The lighter tests (2–12lb) are excellent for trout, bass, and panfish in clear lakes and rivers where leader visibility is a factor. The same invisibility advantage that works offshore works just as well in clear freshwater.

Seaguar Blue Label was developed with Seaguar's exclusive, proprietary Double Structure Technology, our FC Leader is one of the best on the market. Fluorocarbon leaders' advanced strength allows use of smaller pound test vs. other fluorocarbons for more effective presentation.

Incredible impact strength, knot strength and abrasion resistance. Ideal for any leader fishing from 2 to 80 lbs., fresh or salt water. As with all 100% Fluorocarbon products, FC Leader is much less visible underwater than monofilament line and virtually invisible to fish. FC is also UV resistant, chemical resistant, non-absorbant, high-density and impervious to cold conditions.

Made from 100% Seaguar resins and produced using our proprietary extrusion process.

Available Line Sizes - 25 Yards

Sunline Super FC Sniper Fluorocarbon Line is a versatile mainline for spinning and casting tackle. Sunline's triple-resin processing is designed to improve suppleness, reduce memory and provide abrasion resistance. Choose both pound test and spool length: this listing includes 200-, 165- and 660-yard options.

Choose your strength and spool length

• 200 yards: 5, 6, 7, 8, 10, 12 and 14 lb.
• 165 yards: 16, 20 and 25 lb.
• 660 yards: 5, 6, 7, 8, 10, 12, 14, 16 and 20 lb.

For light-line and finesse presentations, start with a pound test that matches your rod, reel and hook. The 5–7 lb options are worth considering for drop-shot and shaky-head setups where cover permits lighter line. Heavier tests suit appropriately rated casting tackle and larger presentations. Check reel capacity as well as line strength before moving up a size.

A 660-yard spool can be useful when filling several reels or replacing mainline regularly. The number of fills depends on reel capacity, pound test and backing; spool length alone does not determine how many reels you can fill.

Line diameter reference

The chart includes additional sizes in the FC Sniper range. Use the product selector for the strength and spool-length combinations offered here. Millimeter figures are rounded.

3 Tackle Express Tips

1. Read both parts of the option label. A 16 lb filler spool contains 165 yards, while the 16 lb bulk option contains 660 yards.
2. Control loose coils. Fill to the reel manufacturer's recommended level under even tension. On spinning tackle, close the bail by hand and take up slack before retrieving.
3. Inspect before the next cast. Check the working end after contact with cover. Cut back past rough spots and retie rather than relying on abrasion resistance to compensate for damage.

Frequently asked questions

Can I use FC Sniper on spinning or casting reels?

Yes. Match the line strength and diameter to the reel's capacity and your rod's line rating.

Are all smaller spools 200 yards?

No. The 5–14 lb filler options listed here are 200 yards; the 16, 20 and 25 lb filler options are 165 yards.

When should I choose 660 yards?

Consider it when you use the same pound test on several reels or respool often. Check how much line each reel needs before ordering.

Does low memory mean the line cannot coil or twist?

No. Low-memory processing helps handling, but reel fill, spooling technique and lure rotation can still affect line management.

SPRO Essential Series Gouken Fluorocarbon Line helps you stay in touch with a lure when subtle bites or changes in bottom feel are easy to miss. This Japanese-made line combines a small listed diameter with minimal stretch and abrasion resistance, making it a practical choice for power fishing around rocks, logs, weeds and other structure.

Feel More, Even Around Rough Cover

When a lure ticks bottom or brushes past a log, line feel matters. Gouken is designed to keep contact with the lure while standing up to contact with structure. Its level-wound 164-yard / 150-meter spool is intended to reduce line twist and kinks as you load a reel. For anglers who want more line of the same series, compare the Gouken 656-yard spool.

The Right Pick If...

You want fluorocarbon with a direct, sensitive feel for power-fishing techniques, especially around abrasive cover. It has minimal stretch, so anglers who prefer a more forgiving line should account for that when setting drag and choosing a rod.

Best For

• Power-fishing presentations around rocks, wood and vegetation.
• Keeping contact with a lure to notice light bites and bottom changes.
• Pairing with moving baits such as the SPRO Little John 50 Crankbait, when fluorocarbon suits your setup.

Key Features

• Japanese-made fluorocarbon line.
• Minimal stretch for sensitivity and lure contact.
• Abrasion-resistant construction for fishing around structure.
• Level-wound 164 yd / 150 m spool.

Models & Specs

All listed variants come on a 164 yd / 150 m spool. Diameters are from the existing product specifications.

Fishing and Spooling Tips

• Match the listed strength to your lure, reel and the cover you fish.
• Check the line regularly for rough spots after contact with rocks or wood.
• Keep steady tension while spooling to take advantage of the level-wound line.

FAQ

How much line is on the spool? Each listed option is 164 yards / 150 meters.

What strengths are available? The listed variants are 10, 12, 14, 16 and 20 lb.

Is there a longer spool? Yes, Tackle Express also lists a 656-yard Gouken spool.

Choose the strength that fits your rig and keep contact with your lure through the next stretch of cover.

Seaguar Blue Label 100% Fluorocarbon is developed with Seaguar's exclusive, proprietary Double Structure Technology, our FC Leader is one of the best on the market. Fluorocarbon leaders' advanced strength allows use of smaller pound test vs. other fluorocarbons for more effective presentation. Incredible impact strength, knot strength and abrasion resistance. Ideal for any leader fishing from 2 to 80 lbs., fresh or salt water. As with all 100% Fluorocarbon products, FC Leader is much less visible underwater than monofilament line and virtually invisible to fish. FC is also UV resistant, chemical resistant, non-absorbant, high-density and impervious to cold conditions.

Made from 100% Seaguar resins and produced using our proprietary extrusion process.

Available Line Sizes - 50 Yards

Seaguar Invizx Fluorocarbon Line is at the top of it's class. We love this line for many reasons but the most impressive thing is how limp and strong it is. The limpness is great when using Seaguar Invizx on spinning reels. This reduces memory allowing you to cast further without the curly-que effect.

Lots of fluorocarbon lines lose strength when they improve limpness, but Seaguar was able to keep this line strong and sensitive. It's as sensitive as your girlfriend in high school but as strong as your Russian masseuse. As with all Seaguar fluorocarbon lines, it's diameter is very thin. Invizx is no exception and it still remains one of our top selling lines. These spools are 200 yards of pure fish catching line.

The Leader That Fights Back

When finicky tuna and billfish are refusing everything else, the Aftco Saiko Pro Fluorocarbon Leader Line is the edge serious anglers reach for. Made from a 100% custom formula fluorocarbon manufactured in Japan, Saiko Pro is engineered for real-world performance — not just lab numbers. It's supple enough to tie clean knots, hard enough to resist the roughest structure, and strong enough to hold when it matters most.

Built for the Talica Series — and Every Big-Game Setup

Saiko Pro delivers industry-leading tensile strength, abrasion resistance, and break energy ratings across the full range from 12lb to 300lb test. Whether you're rigging up for yellowfin, white seabass, or blue marlin, there's a Saiko Pro size built for the job. The 12–80lb range is available in both Clear and Pink; 100–300lb is available in Clear.

Why Leader Material Actually Matters

Most fluorocarbon weakens after contact with structure, teeth, or gill plates. Saiko Pro is up to 20% stronger after abrasion than leading competitors — a critical difference when you're fighting a fish that's already tested your gear. The knot and crimp strength is unmatched, and the AFTCO SecureSpool™ system keeps your leader organized and tangle-free between trips.

Clear vs. Pink — Which to Choose

Clear is the go-to for most conditions — low visibility, high clarity water, and pressured fish. Pink shines in cloudy or stained water where it can actually reduce visibility at depth. Many offshore anglers keep both on hand and match to conditions.

The Right Pick If...

• You're targeting tuna, billfish, or inshore species that leader-shy
• You need a leader that holds up to structure, teeth, and repeated use
• You want a premium Japan-made fluorocarbon with proven offshore credentials
• You're rigging with crimps or tying direct — Saiko Pro handles both

Best Fishing Techniques

• Chunking and live bait for tuna and billfish
• Slow-pitch and vertical jigging with fluorocarbon top shots
• Inshore live bait rigs for white seabass and yellowtail
• Kite fishing and flat-line trolling leaders
• Crimped big-game rigs for 100lb+ applications

Best Conditions

• Clear to moderately stained water (use Pink in cloudy conditions)
• Offshore blue water and nearshore kelp/structure
• Any situation where fish are leader-shy or biting short

Best For

• Species: Bluefin tuna, yellowfin tuna, white seabass, yellowtail, billfish, marlin, wahoo
• Techniques: Live bait, chunking, jigging, trolling, kite fishing, crimped big-game rigs
• Use Cases: Offshore leader material, inshore top shots, fluorocarbon shock leaders

Key Features

• 100% custom formula fluorocarbon — made in Japan
• Up to 20% stronger after abrasion than leading competitors
• Industry-leading tensile strength, abrasion resistance, and break energy ratings
• Supple finish for easy knot tying; hard outer shell for maximum abrasion resistance
• AFTCO SecureSpool™ for tangle-free leader storage
• Available in Clear (12–300lb) and Pink (12–80lb)
• Proven on tuna, billfish, and inshore species worldwide

Models & Specs

Tackle Express Tips

• Match your leader to your main line: For braid-to-fluoro connections, use an FG knot or PR bobbin knot for maximum strength and a slim profile through the guides.
• Go heavier in structure: When fishing near kelp, rocks, or the boat hull, bump up one or two line classes — the abrasion resistance will pay off.
• Pink in the chop: On overcast days or in green water, the pink color diffuses at depth and can actually be less visible to fish than clear. Don't overlook it.

FAQ

What's the difference between the Clear and Pink versions?
Both are the same custom fluorocarbon formula. Pink is designed for cloudy or stained water conditions where it becomes less visible at depth. Clear is the standard choice for most offshore and inshore applications.

Can I use Saiko Pro with crimps?
Yes — AFTCO specifically engineered Saiko Pro for both knotted and crimped applications. The knot and crimp strength is one of its standout features, making it ideal for big-game rigs in the 100–300lb range.

Is Saiko Pro suitable for inshore fishing?
Absolutely. While it's built for offshore performance, the 12–30lb range is excellent for white seabass, yellowtail, and other inshore species that are leader-shy in clear water.

 SEAGUAR ABRAZX
Seaguar Abrazx Fluorocarbon Fishing Line has unparalleled abrasion resistance and amazing knot strength.  We love it when fishing around cover that is sharp and can cause abrasion to your line.  Increased exposure to abrasion will cause your line to break under its original line strength.  We find it great for jigs, flipping, bottom fishing, and many other conditions.

Rocks, weeds, docks. Hit the heavy cover with confidence. Now your whole spool can handle the toughest conditions with a main line fluorocarbon designed with unparalleled abrasion resistance. 

Seaguar Abrazx can be used in both spinning reels and bait casting reels but we find it better on casting reels. The line has exceptional knot and impact strength and is extremely soft and sensitive for better feel and smoother casting. As with all 100% Fluorocarbon products, Abrazx is much less visible underwater than monofilament line and virtually invisible to fish. The line is also UV resistant, chemical resistant, non-absorbant, high-density and impervious to cold conditions.

• 100% Fluorocarbon• LB. Test: 4 LB. - 25 LB.
• Diameter: .165 mm/.007 in. - .435 mm/.017 in.
• Spool Lengths: 200 Yards

The Big Bait That Triggers Giant Bites

The Bottom Dweller Baits Shiner6 is a 6" slotted soft swimbait built to imitate the large baitfish that trophy bass and big predators key on. With a head wobble, full body roll, and a hard-thumping tail that tracks true at any speed, this is a rig-and-throw bait that does the work for you. If you're targeting quality fish over quantity, the Shiner6 belongs in your box.

Engineered for Big Bait, Big Fish Fishing

The Shiner6 is built around a slotted body design that allows it to be rigged weedless on a heavy swimbait hook with zero fuss. The extremely soft yet durable plastic gives it a lifelike flex and feel that fish don't want to let go of, while the body's action — head wobble, body roll, tail thump — works at slow crawls and faster retrieves alike. At approximately 2oz, it has the weight to cast on heavy gear and get down to where big fish live.

When Small Baits Stop Getting Big Bites

When pressured bass stop responding to finesse presentations and smaller swimbaits, it's time to upsize. The Shiner6's 6" profile triggers reaction strikes from fish that have seen every small bait in the box. Big bait, big profile, big fish — it's that simple.

Soft Enough to Feel Real. Tough Enough to Last.

Most soft swimbaits in this size range either feel too stiff to produce natural action or tear apart after a fish or two. The Shiner6 uses an extremely soft but durable plastic that survives the fight without losing its action. You get a bait that feels real on the bite and holds up through multiple fish.

The Right Pick If...

• You're targeting trophy largemouth, spotted bass, or other large predators
• You want a big bait that tracks true at all retrieve speeds
• You fish heavy swimbait setups with stout rods and 15–20lb fluorocarbon
• You need a weedless rig option in a large profile bait

Best Fishing Techniques

• Weedless rigging on a 6/0–8/0 heavy swimbait hook (Owner Beast Hook recommended)
• Slow-rolling near the bottom or along structure
• Open water mid-column swimming retrieve
• Big bait fishing around docks, points, and deep structure

Best Conditions

• Clear to lightly stained water where a large baitfish profile is visible
• Post-spawn and fall when bass are feeding on larger forage
• Pressured fisheries where smaller baits have stopped producing
• Freshwater lakes, reservoirs, and deep structure

Best For

• Species: Largemouth bass, spotted bass, striped bass, large predatory fish
• Techniques: Big bait swimbait fishing, weedless slow-roll, open water swimming
• Gear: 7'+ Heavy to Extra-Heavy rod, 15–20lb fluorocarbon, 6/0–8/0 hook

Key Features

• 6" slotted soft swimbait — weedless-ready design
• Head wobble, full body roll, and hard-thumping tail action
• Tracks true at all retrieve speeds
• Extremely soft yet durable plastic construction
• Approximately 2oz — built for heavy swimbait gear
• 1 bait per pack
• Available in Sexy Shad, Big Fish, and Mint Silver

Models & Specs

Length: 6"  |  Weight: ~2 oz  |  Slotted body design

Tackle Express Tips

• Go with the Owner Beast Hook 6/0–8/0. Bottom Dweller specifically recommends this hook for a reason — it's stout enough to handle the 2oz bait and strong enough to land big fish without straightening under pressure.
• Fish it slow. The Shiner6's action is most effective at a slow, deliberate retrieve. Let the tail thump do the work — resist the urge to speed up, especially in cold water.
• Match color to forage. Sexy Shad and Mint Silver shine in clear water; Big Fish is a go-to when bass are keying on larger, darker baitfish or in off-color conditions.

FAQ

What hook and line do you recommend for the Shiner6?
Bottom Dweller recommends the Owner Beast Hook in 6/0–8/0 paired with 15–20lb fluorocarbon line. The heavy hook handles the 2oz bait weight and the fluoro's low visibility keeps the presentation natural in clear water.

What rod should I use?
A 7'+ Heavy to Extra-Heavy rod is required for this bait. The 2oz weight demands a stout blank to load properly on the cast and set the hook effectively on big fish. A dedicated swimbait rod in the 7'6"–8' range is ideal.

How many baits come per pack?
The Shiner6 comes 1 bait per pack. At 6" and ~2oz, this is a premium big bait — each one is built to last through multiple fish thanks to the durable soft plastic construction.

Seaguar Gold Label Fluorocarbon Leader is not only thinner, it's even less visible underwater than all other fluorocarbon leaders.  You also get the advantage of more natural presentations and better catch-rates on finicky fish. Made with our exclusive double-structure process, we combine two custom Seaguar fluorocarbon resins to create a leader with smaller diameters yet with exceptional knot and tensile strength. It’s softer as well and cinches easily for fail-safe knots.

Features:

• 18% Thinner Diameter
  
• 17% Better Knot/Tensile Strength
  
• Extremely soft and supple and cinches easily for fail-safe knots
  
• Lowest Line Memory, making line management more user friendly
  
• 100% Fluorocarbon Leader
  
• Double Structure Fluoro
  
• Level Wind Technology
  
• Spool Length: 50 Yards
  

The Daiwa J-Fluoro Samurai FC Hidden Fluorocarbon Line is a high-end fluorocarbon mainline perfect for Bass, Panfish, Trout, and Walleye anglers alike.

Made in Japan, Samurai FC Hidden Fluorocarbon is designed to bring a new level of fishability to all, offering a multitude of sizes with varying levels of stretch and stiffness and super small diameters

Wound on ergonomic spools with convenient filler-enabled spool protectors, a D-Vec halfway sticker is located at 110 yards to inform the user of the available line, and an extra-large spool band is included on bulk spools for easy line management.

A must-have for anglers who are serious about masking their presentations, the Daiwa J-Fluoro Samurai FC Hidden Fluorocarbon Line provides unmatched strength and abrasion resistance and conceals your line in stained water conditions.

Yo-Zuri is “The Original” industry leading 100% Pink Fluorocarbon leader material and current I.G.F.A. World Record Holder for 200# Yo-Zuri H.D. Carbon Disappearing Pink 100% Fluorocarbon Leader. The impressive 427# Yellowfin Tuna was caught by Guy Yocum aboard “El Suertudo”. Yo-Zuri’s proprietary blend of 100% Fluorocarbon, coupled with our “penchant for perfection” during the extrusion process, allows us to provide anglers with the disappering pink leader material known worldwide.

Features:

• 100% Fluorocarbon leader material
• Proprietary formula extruded in our own private factory
• The "original" disappearing pink leader
• World record holder for Yellowfin Tuna
• Superior abrasion resistance and overall strength

Specifications:

The Seaguar Tatsu Fluorocarbon Line is amazingly strong and abrasion resistant. Its superior, state-of-the-art double-structure process fuses two custom 100% fluorocarbon resins which creates the world's only double-structure main line. Fill your spool with Tatsu and you'll be amazed at this ultra thin, strong, and virtually invisible line.

Spool Size: 200 yards

Available Line Sizes

Seaguar Pink Label™ 100% fluorocarbon leader material is made from exclusive Seaguar resins. Pink Label is soft and supple with superior strength, abrasion resistance and minimal stretch. It's also lightweight and buoyant, so it can cast farther and perform better underwater than other fluorocarbon lines. 

The pink color is one of the first colors to disappear in water making it even more invisible than other colored or non colored lines.  We have had bites where they would only bite pink label, it's worth a try if you haven't already.

Seaguar Red Label, Strong and Highly Abrasion Resistant, Premium, 100% Fluorocarbon Performance Fishing Line, Virtually Invisible.

Red Label is strong and highly abrasion resistant with good knot and tensile strength.

100% fluorocarbon; virtually invisible; made in Japan with cutting-edge innovation; fill your spool with this main line fluorocarbon.

This is a hard working fluorocarbon line designed for bait casting reels that provides great performance and value at an economical price.

200 yards

P-Line Floroclear Fluorocarbon Coated Line combines a copolymer line with a fluorocarbon coating and a silicone treatment designed to reduce memory and improve casting. This listing is for a 300-yard spool, with pound-test options from 2 to 12 lb. It is a coated copolymer, not a 100% fluorocarbon line.

Features and specifications

• Construction: fluorocarbon-coated copolymer.
• Handling: silicone-treated to reduce line memory and aid casting.
• Spool length: 300 yards.
• Pound-test options: 2, 3, 4, 5, 6, 8, 10 and 12 lb.
• Uses: mainline for presentations matched to your rod, reel, lure and cover, including light tackle and bass finesse fishing.

Choosing your pound test

Use your rod's line rating and reel's capacity guidance as starting points. Lower pound tests suit lighter tackle and smaller presentations where abrasion is limited. Consider a higher test within your tackle's ratings when fishing larger baits or around more cover. No single pound test is suitable for every fish, lure or location.

The 300-yard length describes how much line is on the supply spool. How many reels it fills depends on reel capacity, the selected line size and how much backing you use.

3 Tackle Express Tips

1. Fill to the reel's recommended level. Maintain even tension while spooling and avoid overfilling, which can encourage loose coils.
2. Check the working end. After contact with rocks, wood or a fish, feel for rough spots and cut back past damaged line before retying.
3. Test each fresh knot. Moisten it before tightening, seat it smoothly and pull-test the connection before casting.

Frequently asked questions

Is Floroclear 100% fluorocarbon?

No. Floroclear is a copolymer line with a fluorocarbon coating. Choose a line specifically labeled 100% fluorocarbon if that construction is required for your setup.

How much line is on this spool?

Each spool in this listing contains 300 yards.

Which pound tests are offered here?

The options are 2, 3, 4, 5, 6, 8, 10 and 12 lb. Select the strength suited to your tackle and fishing conditions.

Does the silicone treatment eliminate memory?

It is designed to reduce memory, not eliminate it. Correct spooling, storage and reel fill still matter.

Premium Fluorocarbon for Serious Anglers

The Shimano Mastiff Fluorocarbon Line delivers premium fluorocarbon performance designed for serious anglers who demand invisibility, sensitivity, and strength. Built with advanced fluorocarbon technology and precision manufacturing, this line provides exceptional abrasion resistance, low visibility, and reliable knot strength for both freshwater and saltwater applications. The Mastiff represents Shimano's commitment to creating high-performance fishing line.

Advanced Fluorocarbon Technology

• 100% Fluorocarbon: Pure fluorocarbon construction provides maximum invisibility underwater
• Low Refractive Index: Nearly invisible to fish in all water conditions
• Fast Sinking: Denser than water for quick descent and maintaining lure depth
• Low Stretch: Minimal stretch provides excellent sensitivity for detecting bites
• UV Resistant: Resists degradation from sunlight exposure for long-lasting performance
• Water Absorption Resistant: Maintains strength and performance in all conditions

Premium Performance Characteristics

• Superior Abrasion Resistance: Withstands contact with rocks, wood, and structure
• Excellent Knot Strength: Reliable knots hold strong under pressure
• Smooth Casting: Low memory and supple construction for easy casting
• Consistent Diameter: Precision manufacturing ensures uniform line diameter
• High Tensile Strength: Strong pound-test ratings for fighting big fish
• Shock Resistance: Absorbs sudden strikes and runs without breaking

Versatile Fishing Applications

The Mastiff Fluorocarbon excels across a wide range of fishing applications. Use as leader material for freshwater and saltwater fishing, spool directly on spinning or baitcasting reels for finesse techniques, fish around heavy cover and structure with confidence, work for clear water conditions where invisibility is critical, or handle any situation where fluorocarbon's unique properties provide advantages.

Multiple Pound Test Options

Available in multiple pound test ratings to match your specific fishing applications, from light finesse fishing to heavy-duty trophy hunting. Each pound test is optimized for specific techniques while maintaining the premium performance characteristics that define the Mastiff line.

Key Features

Shimano Quality and Innovation

Shimano has been the global leader in fishing tackle innovation for decades, and the Mastiff Fluorocarbon continues this proud tradition with advanced fluorocarbon technology and precision manufacturing. Every spool is produced to exacting standards and tested to ensure consistent performance. From weekend anglers to tournament professionals, the Mastiff delivers the invisibility, sensitivity, and strength that serious anglers demand.

Experience the premium fluorocarbon performance that serious anglers trust. The Shimano Mastiff isn't just fishing line—it's a critical component of your fishing success.

Fish with confidence using Shimano Mastiff Fluorocarbon—where invisibility meets strength.

Seaguar Blue Label Fluorocarbon has incredible abrasion resistance & impact strength.

Description

Developed with Seaguar's exclusive, proprietary Double Structure Technology, our FC Leader is one of the best on the market. Fluorocarbon leaders' advanced strength allows use of smaller pound test vs. other fluorocarbons for more effective presentation. Incredible impact strength, knot strength and abrasion resistance. Ideal for any leader fishing from 2 to 80 lbs., fresh or salt water.

As with all 100% Fluorocarbon products, FC Leader is much less visible underwater than monofilament line and virtually invisible to fish. FC is also UV resistant, chemical resistant, non-absorbent, high-density and impervious to cold conditions. No wonder it's preferred by anglers the world over.

Highlights

• 100% Double-Structure Fluorocarbon
• Level Wind Technology
• LB. Test: 2 LB. - 80 LB.
• Diameter: .117 mm/.005 in. - .810 mm/.032 in.
• Spool Lengths: 25, 50 & 100 Yards

Available Line Sizes - 100 Yards