Maxima · Fishing Line
Maxima Tuna Blue Monofilament Line MBTB-40
Lower PFAS concern than coated products, but Maxima makes no public disclosure.
Maxima's monofilament fishing line is extruded nylon without documented Teflon-family coating coatings or water-repellent treatments typical of PFAS-risk products. No independent lab testing or brand PFAS claims are publicly available.
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Monofilament nylon fishing line
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Maxima Tuna Blue is extruded monofilament nylon (likely nylon 6 or nylon 6,6), a single continuous polymer strand dyed with colorant additives. Unlike braided or coated lines, monofilament has no Teflon-family coating, adhesives, or layered materials that typically release problematic compounds. The primary chemical exposure risk during use is minimal because the line remains inert in water and does not contact food; dye migration into water is negligible under normal fishing conditions.
The brand's record and disclosure
Maxima Ultragreen (the parent company's flagship brand) has a long market history but makes no public safety disclosures, third-party certifications, or PFAS commitment statements. No major recalls or documented contamination events are on record for Maxima monofilament products. The brand competes on performance (strength, abrasion resistance, knot retention) rather than transparent ingredient labeling, which is typical across fishing line manufacturers.
How it compares in its category
Standard monofilament lines (nylon-based) are safer than fluorocarbon-coated alternatives, which may contain legacy PFAS in fluorine-based polymers. Braided Dacpolyester lines avoid nylon altogether but introduce microplastic shedding risk in freshwater systems. Maxima Blue sits in the conventional middle: uncoated nylon with standard dyes, no disclosed performance enhancers or exotic additives that would raise hazard concern relative to competitors like Berkley Trilene or Sufix.
If you buy it
Store spools in cool, dry conditions away from direct UV light, which degrades nylon over time and may accelerate dye fading. Do not heat-treat or intentionally melt the line. Replace line annually or after heavy use, as micro-abrasion and UV exposure weaken the polymer structure and can cause breakage under load. Properly dispose of old line in trash or fishing-specific recycling programs, not waterways.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Nylon polymer degradation (UV and thermal)
Monofilament nylon degrades under UV exposure and high temperature, potentially releasing oligomers or monomers into water over extended time; risk is low in typical freshwater use but increases with intense sun exposure or storage in heat.
Dye leaching and color migration
The 'Blue' pigmentation relies on synthetic dyes bonded to nylon; under prolonged water contact and pH variation, minor dye migration is theoretically possible, though impact on aquatic life is unquantified and likely negligible given dilution in natural water bodies.
Microplastic release during use
Friction with guides, knots, and abrasion against rocks or reefs produces microscopic nylon particles; these fragments enter aquatic systems, though monofilament shedding is generally lower than braided alternatives.
Heavy metal contaminants in colorants
Modern synthetic azo and phthalocyanine dyes used in fishing line typically do not contain lead or cadmium; no reported contamination in Maxima products or standard nylon monofilament.
Allergic reaction or skin irritation (direct contact)
Nylon monofilament is non-toxic on intact skin and does not off-gas volatile compounds during normal use; no established allergen risk from the line itself, though dye handling during manufacturing is controlled industrially.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Fishing Line
Stren
Original
Monofilament nylon fishing line
Lower PFAS concern for a fishing line product; no coating or treatment typical of PFAS carriers.
⚠Risky category by default
Maxima
Ultragreen One Shot
Lubricant/chain oil (mineral or synthetic base)
Lower PFAS concern for a chain lubricant; minimal Teflon-family coating/waterproofing risk profile.
⚠Risky category by default
Seaguar
Blue Label
Fluorocarbon fishing line (monofilament)
Fluorocarbon fishing line may contain PFAS; insufficient public data to grade definitively.
⚠Risky category by default
More fishing line grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.