Dexcraft · Waterproof Personal Electronics
Sea to Summit TPU Guide Waterproof Case
TPU waterproof cases often use PFAS coatings; no disclosure available.
Sea to Summit TPU cases rely on waterproof treatments to function, typically Teflon-family coating-based. Brand discloses nothing about PFAS content or alternatives used.
The safe swap
Pelican
Pelican M40 Micro Case
100/100 safety
Same rubric that flunked this product. The swap earned its A.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
TPU (thermoplastic polyurethane) with waterproof coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
This case is thermoplastic polyurethane (TPU), a flexible synthetic polymer chosen for water resistance and durability. The waterproof performance almost certainly relies on a surface coating or formulation that is not publicly disclosed by Dexcraft. TPU itself is considered stable under normal consumer use, but the coating chemistry is the actual risk point. Without manufacturer specification, the coating composition cannot be verified.
The brand's record and disclosure
Dexcraft has no published safety certifications, third-party testing disclosures, or chemical transparency statements available in public records. The brand does not disclose material sources, coating chemistry, or testing against common contaminant classes. This silence is a red flag in a category where waterproofing coatings routinely contain fluorochemicals, yet the brand offers no reassurance either way.
How it compares in its category
Waterproof phone and device cases typically rely on either mechanical sealing (o-rings, sealed zippers) or chemical water-repellent coatings. This TPU case sits in the coating-dependent segment, which is common but less transparent than sealed-joint designs. Competitors in the space (e.g., OtterBox dry cases, mechanical seal designs) offer clearer material declarations, though many also use undisclosed coatings. TPU cases are generally preferred for flexibility and touch-screen usability, a tradeoff against disclosure.
If you buy it
Avoid prolonged heat exposure above 60°C (140°F), as TPU can soften and the coating integrity may degrade. Do not use in direct dishwasher or boiling water. Rinse with cool fresh water after salt or chlorinated water exposure to slow coating degradation. Replace the case if visible cracking, peeling, or loss of water resistance appears. Contact with strong solvents (acetone, some hand sanitizers) may compromise the coating.
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.”
Waterproof coating composition (likely fluorochemicals)
TPU waterproof cases typically use water-repellent coating (water-repellent coating) or urethane-based coatings that often contain PFAS or similar persistent chemicals. Dexcraft discloses neither the coating type nor chemistry, making independent hazard assessment impossible.
TPU thermal degradation and volatile release
TPU is stable at room temperature but can emit minor volatile compounds when heated above 60°C or in direct sunlight over long periods. This is not a primary hazard under typical use but could be relevant if stored in hot vehicles.
Coating adhesion loss and microparticle shedding
As the waterproof coating ages or is scratched, TPU cases may shed microscopic coating particles, particularly if the formulation is brittle. No data exists on whether Dexcraft's coating remains intact after normal wear cycles.
Contact allergens or skin irritation from coating or colorants
No documented reports of allergic contact dermatitis or irritation from this specific product. TPU and typical dyes are low-sensitization materials, but the undisclosed coating formulation cannot be fully ruled out.
Leaching into liquids from coating or TPU plasticizers
TPU does not typically leach phthalates or BPA under normal use with water. The coating is applied to the surface and not intended to contact food or drinking water directly, so systemic leaching risk is low.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% 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 Waterproof Personal Electronics
Pelican
M40 Micro Case
Polypropylene copolymer plastic case with solid construction, no Teflon-family coating
Lower PFAS concern. Rigid PP case with no waterproofing treatment.
✓Naturally PFAS-free material
Urban Armor Gear (UAG)
Pathfinder MagSafe Case for iPhone
Thermoplastic polyurethane (TPU) and metal alloy components
Lower concern. TPU phone case has minimal PFAS risk profile.
⚠Brand says nothing about PFAS
Urban Armor Gear (UAG)
Pathfinder Case for Galaxy
TPU polymer, impact-resistant composite
Lower concern, but no PFAS transparency from UAG.
⚠Brand says nothing about PFAS
More waterproof personal electronics 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.