TomTom · Waterproof Smartphone Cases
TomTom Spark GPS Fitness Watch
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes plastic case, elastomer band, with no water-repellent coating named. Water resistance on products like this usually comes from the material and its seals rather than a surface treatment. The brand has published no PFAS statement for it.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Plastic case, elastomer band
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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.
Elastomer band degradation and skin irritation
Prolonged sweat and heat exposure can soften or degrade silicone and rubber elastomers, though this is a durability issue rather than a chemical toxicity hazard. Individuals with latex sensitivity should verify the band material (typically latex-free in modern sport watches) before purchase.
Bacterial or mold colonization on band
Elastomer bands trap moisture in skin contact creases. Regular cleaning with soap and water mitigates this common hygiene concern in all wearable bands; it is not specific to TomTom and poses no chemical risk.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Plastic case leaching from wear
No published evidence of polycarbonate or acrylic composite cases in sport watches leaching BPA or other chemicals into skin or sweat. The case does not come into sustained contact with food or liquids that would accelerate leaching.
Battery or internal component toxicity
The sealed battery compartment and electronics are not user-accessible and pose no direct chemical hazard during normal wear. Disposal requires proper e-waste recycling, but this is an end-of-life concern, not a use-phase risk.
Off-gassing from plastic or adhesives
No formaldehyde resin coatings or VOC-emitting adhesives are documented in GPS watch cases. Off-gassing is not a reported concern for this product category.
The full breakdown
What it's made of and why it matters
The TomTom Spark uses a rigid plastic case (likely polycarbonate or acrylic composite) paired with an elastomer (rubber or silicone) wristband. Plastic cases in GPS watches are selected for light weight and durability rather than non-stick properties, so they do not require Teflon-type coating coatings that pose fume risks. The elastomer band material is not a soft vinyl product known to contain phthalates; most sport watch bands use thermoplastic rubber or silicone, which are inert when in skin contact.
The brand's record and disclosure
TomTom is a Dutch navigation and location technology company with no publicly documented controversies over chemical hazards in wearables or sport watches. The brand does not issue transparency statements about PFAS, phthalates, or other chemical inputs in consumer products, and no independent testing of this model has been published in consumer safety databases. This silence is typical for electronics brands outside the apparel sector and does not suggest a hidden problem.
How it compares in its category
As a GPS fitness watch (not a smartphone case, despite the categorization prompt), the Spark sits in a mature product category with minimal chemical risk compared to soft-plastic phone cases or textiles. Hard-case sport watches from Garmin, Apple, and Fitbit share the same material profile and pose no known greater hazard. The closed electronic design and lack of coatings mean fewer material layers to fail or leach.
If you buy it
Clean the band regularly with mild soap and water to prevent bacterial growth in skin contact areas, especially after sweat exposure. Avoid prolonged exposure to extreme heat (above 60 degrees Celsius / 140 Fahrenheit) which may degrade the elastomer over time. Replace the band if it shows cracks, discoloration, or loss of elasticity; TomTom offers aftermarket bands. The watch's waterproof rating (typically 5 ATM on this model) relies on sealed gaskets, not coatings, so do not open the case yourself.
What we don’t know
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- TomTom has made none
Formulations change between production runs, so check the current label. How we grade.
More waterproof smartphone cases 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.