SealLine · Waterproof Bags & Luggage
SealLine Pro Dry Pack
Dry pack coating unknown; brand provides no PFAS transparency.
SealLine's waterproofing treatment details are not publicly disclosed. No independent testing or PFAS certifications exist for this product.
The better-graded swap
Pelican
Pelican 1595 Air Travel Case
85/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Ripstop nylon with waterproof coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What SealLine Pro Dry Pack is made of, ingredients and materials
SealLine Pro Dry Pack is constructed from ripstop nylon, a tightly woven polyamide fabric engineered for puncture resistance, with an applied waterproof coating. The coating composition is not publicly disclosed by SealLine, which is the critical unknown, waterproof coatings on textiles historically relied on PFAS chemistry, though non-PFAS alternatives (polyurethane, silicone-based) now exist. Ripstop nylon itself poses minimal chemical hazard when uncoated, but the proprietary topical treatment is where contamination risk concentrates.
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.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Waterproof coating composition (unspecified chemistry)
SealLine does not disclose whether the ripstop nylon coating contains PFAS, polyurethane, silicone, or other formulations. Without testing or certification, contamination risk cannot be ruled out, particularly if coating contacts food or skin for extended periods.
Microplastics
Ripstop nylon is a synthetic polyamide; mechanical abrasion, washing, or UV degradation can release microplastic fibers. Risk is low for intended use (dry storage bag), but increases if the product is aggressively rubbed, washed frequently, or stored outdoors for years.
Source, EPA ↗Coating degradation and leachate release
As waterproof coatings age or crack, monomers and polymeric fragments may leach into contents, especially if bags store food, beverages, or items in warm environments. No specific leachate testing is publicly available for SealLine Pro.
What’s reassuring
Heavy metals
No recalls or published testing indicate cadmium, lead, or other heavy metals in SealLine Pro nylon or coating. Ripstop nylon dyes are generally low-risk, but absence of third-party certification means this hazard is not actively verified.
Source, FDA ↗Formaldehyde / VOCs
Modern ripstop nylon typically does not require formaldehyde-based finishing resins. No evidence suggests this product contains formaldehyde, but technical specifications are not published to confirm.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
SealLine (owned by Cascade Designs) does not publicly disclose coating chemistry, PFAS testing results, or PFAS avoidance commitments on product pages or technical documentation reviewed. The brand has not achieved OEKO-TEX, BLUESIGN, or similar third-party waterproofing certifications that would verify PFAS-free or heavy-metal-free status. No major recalls or chemical contamination incidents are recorded for this specific product line, but silence on PFAS is a notable gap given widespread industry awareness since 2015.
How it compares in its category
Dry packs and waterproof bags occupy a middle tier of chemical risk, higher than uncoated cotton or canvas, lower than vinyl or PVC alternatives. Premium competitors (e.g.Ortlieb, which publicly commits to not using PFAS in coatings, offers greater transparency. Budget alternatives often use cheaper PVC or plastisol coatings with confirmed PFAS or phthalate content. SealLine Pro sits in a transparency gap, reputable brand, but no commitment to proven safe coating chemistry.
If you buy it
Use this product for dry storage of clothing, electronics, and food in outdoor/water contexts only; do not intentionally heat, microwave, or expose to prolonged direct sunlight, which may degrade the coating and increase leachate risk. Inspect the coating annually for cracks, peeling, or cloudiness; replace if visible degradation occurs. Wash the exterior with cool water and mild soap only; avoid solvents or high heat drying. Store in a cool, dry place away from direct UV when not in use to extend coating life and minimize off-gassing.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- SealLine has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to SealLine Pro Dry Pack?
- Cordura nylon fabric
- We found no PFAS statement from the brand
- Heavy metals
- Polyester webbing and nylon
- Azo dyes in polyester webbing
4 hazards checked on this product, all on its full breakdown.
- Polypropylene shell, polyurethane foam, stainless steel hardware
- Polyurethane foam degradation and off-gassing
More waterproof bags & luggage 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.