Shimano · Fishing Tackle & Gear
shimano Kairiki 8 Braided Fishing Line
Lower concern. Braided polyethylene line has minimal PFAS risk.
Shimano Kairiki 8 is polyethylene braided line with no known PFAS coatings or treatments. Standard fishing line material carries lower PFAS concern than treated apparel or nonstick cookware.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Braided polyethylene fishing line
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What shimano Kairiki 8 Braided Fishing Line is made of, ingredients and materials
Shimano Kairiki 8 is a braided polyethylene (PE) fishing line, meaning multiple strands of PE polymer are woven together rather than a single solid strand. Braided PE lines are chemically stable at room temperature and during normal fishing use; polyethylene does not off-gas volatile organics or leach plasticizers like some other polymers. The braided structure provides tensile strength and abrasion resistance without requiring chemical stabilizers or colorants that would introduce additional hazard.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Microplastic shedding during use
Braided PE line can fragment into small particles through abrasion against guides, knots, and rocks during fishing. These shed particles enter aquatic environments; long-term ecological impact is documented, but direct consumer health risk from handling intact line is none_known.
UV degradation and structural failure
Polyethylene fishing lines degrade and lose strength when stored in sunlight. This creates risk of line breakage during use (potential injury from released tension) rather than chemical toxicity, but is a known failure mode for all PE lines including Kairiki 8.
Bacterial or mold colonization if stored wet
Wet braided line stored without drying can support fungal growth in the braided structure, particularly in warm humid conditions. This does not create toxicity but may produce odor or visible contamination; risk is mitigated by rinsing and air-drying after use.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Dye or colorant stability
Kairiki 8 is available in multiple colors. No public reports of dye migration or toxicity from fishing line colorants exist; dyes used in industrial polyethylene are generally high-fastness azo or reactive types, but specific formulation for this product is not disclosed.
Heavy metals
Polyethylene extrusion and braiding do not typically require heavy metal catalysts. No independent testing of Kairiki 8 for lead, cadmium, or arsenic residues has been published, and no regulatory alerts exist for this product class.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Shimano is a major Japanese sporting goods manufacturer with no public history of product safety recalls or chemical disclosure controversies involving fishing line. The company does not advertise third-party testing or chemical certifications for this product category, which is typical for fishing tackle. No independent testing reports or environmental/health warnings specific to Kairiki 8 have been established in public records.
How it compares in its category
Braided PE lines like Kairiki 8 have lower concern for chemical leaching compared to monofilament nylon, since braided PE requires fewer processing additives. Compared to specialty fluorocarbon lines (which may retain more processing residues) or older nylon formulations, braided PE carries lower inherent chemical burden. Shimano's braided offering is representative of mainstream modern fishing tackle with no distinctive safety advantage or disadvantage.
If you buy it
Store the line away from prolonged direct sunlight, which can degrade polyethylene over years and weaken tensile strength, though this does not create chemical hazards. Rinse with fresh water after saltwater use to prevent salt crystallization and bacterial growth on the line surface, though the line itself is biologically inert. Replace when visibly frayed, discolored, or when tensile strength degrades (typically 1-3 years depending on use frequency). No special disposal precautions are required beyond standard recycling protocols for plastics, though fishing line should never be discarded in natural waterways.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Shimano has made none
Formulations change between production runs, so check the current label. How we grade.
More fishing tackle & gear 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.