Xiaomi · Waterproof Smartphone Cases
Redmi Watch 5 Active Midnight Silver - 18-Day Battery Life, 2-Inch Display, 140+ Workout Modes, 5atm Waterproof, Bluetoo
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes unspecified watch body, 5ATM, 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
Unspecified watch body, 5ATM
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 seal degradation (waterproof integrity loss)
5ATM seals rely on rubber or silicone gaskets that degrade with heat, salt water, and UV exposure over 12-24 months of regular use. Water ingress can damage internal electronics and create bacterial growth in trapped moisture.
Nickel leaching from metal casing or fasteners
If the watch body or band includes stainless steel or plated fasteners, prolonged skin contact (especially with sweat) could pose a minor nickel allergy risk for sensitive individuals. Xiaomi does not specify alloy grades or nickel content thresholds.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Adhesive off-gassing from case assembly
No reports of volatile off-gassing from the Redmi Watch 5 Active case assembly, but consumer electronics watches occasionally use epoxy or polyurethane adhesives that can emit low levels of VOCs during manufacturing and initial use. Typical exposure is minimal given the small adhesive volume and skin-contact distance.
Battery leakage or thermal risk
Xiaomi uses standard lithium-polymer batteries in this watch with no known defects or fire incidents on record. Risk is controlled by sealed housing design, though physical damage or extreme heat can compromise cell integrity.
Heavy metals
No disclosure of cadmium, lead, or other heavy metals in the display or circuit board coatings. Consumer smartwatches are subject to RoHS directives in most markets, which restrict these substances, but Xiaomi does not publish component-level test reports for this model.
Source, FDA ↗The full breakdown
What it's made of and why it matters
The Redmi Watch 5 Active uses an unspecified watch body material (likely stainless steel, aluminum alloy, or composite plastic) rated 5ATM waterproof, meaning seals and material density provide water resistance rather than a chemical coating. Xiaomi has not disclosed the specific alloy composition, strap material (typically rubber or plastic), or any surface treatments beyond the waterproof rating. Without transparency on body materials, potential concerns center on the durability of internal seals and any adhesives or elastomers used in the case assembly, which can degrade with salt water or heat exposure over time.
The brand's record and disclosure
Xiaomi has not issued a public PFAS stance or material safety statement for wearables, and the Redmi Watch 5 Active carries no disclosed coating or Teflon-family coating components. The brand does not routinely publish third-party material certifications (e.g., IEC 62368-1, RoHS detailed breakdowns) for consumer electronics at this price point, which is typical for budget smartwatch makers. No recalls or material hazard incidents have been established for this model in public records.
How it compares in its category
Entry-level waterproof smartwatches from Xiaomi, Amazfit, and Garmin rarely include hazardous coatings because their 5ATM rating relies on mechanical seals and material thickness rather than chemical waterproofing. This watch sits at the low-cost end and avoids the premium-material transparency issues seen in higher-end sport watches. Competing models at this price lack detailed material disclosure as well, making the Redmi Watch 5 Active typical rather than exceptional for transparency.
If you buy it
Rinse the watch with fresh water after saltwater exposure to prevent corrosion and seal degradation. Avoid prolonged exposure to extreme heat (sauna, boiling water) as elastomer seals and battery performance degrade beyond 45-50°C. Replace the watch if the 5ATM seal shows visible cracks, clouding under the display, or water ingress, as the sealed design is not user-serviceable. Store in a cool, dry place when not in use to extend battery and seal lifespan.
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
- Xiaomi 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.