SealLine Review, Is SealLine Non-Toxic?
Across 9 graded products, SealLine averages Poor (38/100). On disclosure, the brand says nothing publicly about PFAS. None of its products grade Good or better yet. Grades are model-based estimates, not lab results.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Does SealLine have PFAS, by category
Graded and flagged Poor and Bad, we’d swap these
SealLine
Pro Dry Pack
Ripstop nylon with waterproof coating
Waterproof coating composition (unspecified chemistry)
SealLine does not disclose whether the ripstop nylon coating contains PFAS, polyurethane…
Microplastics
Ripstop nylon is a synthetic polyamide; mechanical abrasion, washing, or UV degradation…
Coating degradation and leachate release
As waterproof coatings age or crack, monomers and polymeric fragments may leach into…
Dry pack coating unknown; brand provides no PFAS transparency.
⚠Waterproof or stain-proof treatment
SealLine
Discovery Dry Bag
Urethane-coated nylon fabric with waterproof treatment
Coating leaching and chemical migration
Urethane coatings can release plasticizers, softeners, or unreacted isocyanate residues…
Degradation of waterproof integrity over time
Urethane and nylon are both prone to UV and heat degradation, especially in outdoor…
Microplastic generation from fabric abrasion
Nylon fabrics shed microfibers when abraded, particularly at stress points like zippers…
PFAS
Industry-wide, most synthetic waterproof coatings historically relied on PFAS-based…
No PFAS disclosure; waterproof coating composition unclear.
⚠Waterproof or stain-proof treatment
SealLine
Wide Mouth Duffel Bag
Nylon/polyester fabric with waterproof coating
Waterproof coating volatiles (thermal stress)
If the coating contains Teflon-type coating or Teflon-family coating, exposure to high…
Coating degradation and microfiber shedding
All polyester-nylon duffels eventually degrade at the seams and surface. As coating…
Off-gassing from synthetic coating during initial use
New sealed bags may emit weak solvent or chemical odors for the first few days…
Mold and bacterial growth in seams if wet and not dried
Duffels are waterproof but not moisture-proof internally; trapped moisture in folds and…
Unknown waterproof treatment; SealLine silent on PFAS in this product.
⚠Waterproof or stain-proof treatment
SealLine
Skylake Dry Daypack
Nylon pack with water-repellent coating waterproof coating, unspecified
PFAS
SealLine does not disclose whether the Skylake uses legacy PFAS-based or modern…
Coating degradation and microparticle shedding
Over 2-3 years of regular use, water-repellent coating coatings can flake or powder…
Dry daypack with unknown waterproof treatment, skip if PFAS matters.
⚠Waterproof or stain-proof treatment
SealLine
Discovery Deck Dry Bag
Coated nylon or polyester, waterproof treatment unspecified
Coating degradation and material leaching
Over time, nylon-polyester coatings can crack or peel with UV exposure and repeated use.…
Undisclosed waterproof treatment composition
SealLine does not disclose whether the coating is PFAS-based, silicone, or another…
Off-gassing or volatile organic compounds from dyes and coatings
Polyester and coated nylon can emit low levels of VOCs during manufacturing or storage…
Microplastic shedding if heated
If the bag is exposed to heat above its rated temperature, the nylon and coating may…
Waterproof dry bag; treatment type not disclosed.
⚠Waterproof or stain-proof treatment
SealLine
Bigfork Dry Daypack
Nylon fabric with water-repellent coating waterproof coating
PFAS
Nylon daypacks routinely use fluorinated water-repellent coating; SealLine's silence on…
Coating degradation and particle shedding
water-repellent coating coatings wear over time and shed microparticles, particularly…
Microplastic shedding from nylon
Nylon is a microplastic source during washing and normal wear friction. The Bigfork's…
Likely contains water-repellent coating, but brand discloses nothing about PFAS content.
⚠Waterproof or stain-proof treatment
SealLine
Black Canyon Dry Pack
Nylon fabric with waterproof/water-repellent coating (water-repellent coating) coating
water-repellent coating degradation and leaching
If the coating chips or wears, microparticles of the water-repellent coating polymer may…
Off-gassing or VOC emissions from coating
New dry packs may emit subtle chemical odors from the water-repellent coating polymer and…
Dry pack material likely treated; PFAS content unconfirmed by brand.
⚠Waterproof or stain-proof treatment
SealLine
Pro Zip Duffel
Waterproof coated nylon or polyester duffel
Coating degradation over time
Waterproof nylon/polyester duffels degrade with age, UV exposure, and flexing; as the…
PFAS
This is addressed in the PFAS grade (20/100) and separate verdict. The coating's…
Avoid until Watershed discloses waterproofing chemistry.
⚠Waterproof or stain-proof treatment
SealLine
Pro Dry Pack
Nylon or polyester with waterproof coating, composition unspecified
Waterproof coating degradation and leaching
Unidentified waterproof coatings on nylon/polyester degrade over time, particularly with…
Microfiber shedding from fabric
Nylon and polyester textiles shed microfibers when abraded or washed. SealLine Pro bags…
Skip until brand discloses waterproof coating.
⚠Waterproof or stain-proof treatment
SealLine and PFAS, common questions
- Does SealLine have PFAS?
- We graded 9 SealLine products, averaging Poor (38/100). None grade Good or better. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is SealLine non-toxic?
- No SealLine product we graded reaches Good. The best of them is SealLine Pro Dry Pack at 40/100.
- Which SealLine products should I avoid?
- The lowest-graded SealLine products we have scored are SealLine Pro Dry Pack, SealLine Pro Zip Duffel, SealLine Black Canyon Dry Pack. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →