GoPro · Waterproof Camera & Lens Protection Cases
SANDMARC Aqua Filter Kit GoPro Hero 13
No coating described, and no PFAS statement from the brand.
The product information we reviewed describes optical glass lens and seals, 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
Optical glass lens and seals
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
Silicone or rubber seals can harden or crack over time, especially in saltwater or high-UV environments, potentially allowing water ingress; no accelerated aging data published by SANDMARC.
Bacterial or algae growth on seals/threads
If seals are not fully dried between uses, or if the case is stored wet, bacterial biofilm can accumulate; this is a maintenance issue, not a manufacturing hazard, but can degrade seal integrity faster.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Polymer housing leachables (if polycarbonate)
If the housing is polycarbonate, BPA or BPS may migrate into water under high temperature; typical use (ambient water contact) poses negligible risk, but housing material composition is not disclosed.
Optical glass optical coatings
High-quality optical filters may include anti-reflective or hydrophobic coatings; SANDMARC does not specify coating type or chemical composition, so assessment of coating stability is not possible.
The full breakdown
What it's made of and why it matters
The SANDMARC Aqua Filter Kit uses optical-grade glass as its primary filtering lens, paired with a sealed polymer (likely polycarbonate or acrylic) housing and elastomer seals. Optical glass is inert and does not leach chemicals into water or air; the seals are designed to remain in contact only with water and the camera body, not with food or skin. No surface coatings, dyes, or resin finishes are documented on this product, which eliminates common hazard vectors in camera accessories.
The brand's record and disclosure
SANDMARC is a third-party GoPro accessory manufacturer; GoPro itself has published no PFAS commitment or detailed material disclosures for accessory lines. Neither brand has issued recalls or hazard warnings specific to aquatic filter kits. The housing materials and seals are not described by SANDMARC in published specifications, limiting ability to assess leachable compounds independently.
How it compares in its category
Optical glass filters present lower concern in underwater lens protection compared to plastic-lens materials that may degrade and UV-absorbing coatings used in some budget alternatives. Most waterproof camera accessories rely on elastomer seals and rigid plastic housings similar to this product. No established safety advantage exists over other major GoPro filter brands, though optical glass construction is a quality marker.
If you buy it
Rinse seals and threads with fresh water after saltwater or chlorinated use to prevent salt buildup and elastomer hardening. Store in a cool, dry place away from direct sunlight to slow seal degradation; most elastomers lose flexibility after 3-5 years of regular exposure. Inspect seals annually for cracks or whitening; replace if visible damage occurs. Do not expose the housing to temperatures above 60°C (140°F), as polymer creep may compromise the seal fit.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- GoPro has made none
Formulations change between production runs, so check the current label. How we grade.
More waterproof camera & lens protection 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.