GoPro · Waterproof Camera & Lens Protection
SANDMARC Aqua Filter Kit GoPro Hero 13
Unknown waterproof treatment composition; limited public disclosure available.
GoPro and Sandmarc provide no public PFAS information on this filter kit's waterproof coatings. Optical products often use water-repellent coating treatments that may contain PFAS, but specific formulation unknown.
The safe swap
Sigma
Sigma WR UV Filter
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
Optical glass lens with waterproof coatings and seals
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 filter is built around optical-grade glass, a chemically stable material with minimal leaching risk in normal use. The critical concern is the waterproof coating system applied to seals and lens surfaces, which GoPro has not publicly detailed. Waterproof coatings on camera optics often rely on hydrophobic or oleophobic treatments, which may include Teflon-family coating or silicone-based compounds. The durability and composition of these coatings directly affect whether they degrade into the water or camera internals over time.
The brand's record and disclosure
GoPro maintains a minimal public stance on material composition for accessory kits and does not publish safety data sheets for the Aqua Filter line. The company has not achieved third-party certifications (such as OEKO-TEX or similar) for water-contact optical accessories. No recalls or reported chemical leaching incidents have been documented for this specific filter kit in consumer databases, though the lack of transparency limits independent verification of safety claims.
How it compares in its category
Optical filters for action cameras typically use uncoated or simply oleophobic-treated glass; this kit's multi-layer waterproof approach is more elaborate than many competitors. Most action camera filters do not undergo the same chemical scrutiny as food-contact or skin-contact products, leaving composition details proprietary. Compared to underwater camera housings, which face stronger regulatory oversight, filter kits operate in a less regulated space.
If you buy it
Rinse the filter with fresh water after saltwater or silty use to prevent coating degradation and mineral buildup on lens surfaces. Store in a dry environment away from direct sunlight and extreme temperature swings, which can stress optical coatings over years of use. Do not attempt to clean internal coatings with solvents or abrasive pads; use only lens wipes designed for optical glass. Replace the filter if you observe cloudiness, coating flaking, or visible delamination, as these indicate structural failure of the waterproof layer.
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.”
Coating degradation and microparticle release
Waterproof coatings on optical glass can degrade from UV, thermal cycling, or saltwater exposure, potentially releasing microscopic coating fragments into the camera housing or water column. GoPro has not disclosed the specific polymer or chemical composition of these coatings, making degradation prediction difficult.
Seal material leachables (elastomers)
Seals in this filter kit are likely silicone or rubber compounds standard to GoPro housing products. No reports of silicone leaching or degradation have surfaced in consumer use, though high-temperature storage or prolonged UV exposure could theoretically stress elastomers over years.
Glass fracture risk
Optical glass is inherently brittle and can shatter under impact or thermal shock (rapid temperature change in water). Fractured glass poses a sharp-edge hazard during handling and could potentially introduce sharp fragments into the camera or aquatic environment.
Optical coating toxicity (unverified composition)
Without disclosure of the specific waterproof coating chemistry, the presence of heavy metals (e.g., antimony, lead), volatile organics, or other processing residues cannot be ruled out. Industry practice suggests minimal toxicity risk for optical coatings on non-food products, but lack of transparency prevents definitive assessment.
Biofilm and bacterial growth on filters (maintenance risk)
Wet filters stored without drying can harbor bacteria or mold on optical surfaces or in seal grooves, which then contaminate camera internals. This is a use and care issue rather than inherent product toxicity, but poor maintenance multiplies microbial and corrosion risks.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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 Camera & Lens Protection
Sigma
WR UV Filter
UV-absorbing optical glass or mineral coating
Lower concern optical filter; no known PFAS-prone components identified.
✓Naturally PFAS-free material
GoPro
HB-Series Lens Collection for HERO13 Black
Glass and optical lens elements
Lower concern. Glass lenses pose minimal PFAS risk typically.
⚠Brand says nothing about PFAS
GoPro
K&F Concept 4-in-1 Filter Kit for GoPro HERO9/10/11
Glass optical filters, metal frames, rubber gaskets
Lower concern. Optical glass filters unlikely to contain PFAS.
⚠Brand says nothing about PFAS
More waterproof camera & lens protection 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.