Atsko · Outdoor Furniture Cushion Protectants
Atsko U-V Block Sun Protection Fabric Treatment
Wait until the brand confirms PFAS status or publishes third-party testing.
Atsko U-V Block protects fabric from sun damage with undisclosed chemistry. No PFAS certifications or claims exist; opacity limits safety confidence.
The better-graded swap
Murphy Oil Soap
Colgate Murphy Oil Soap Multiuse Spray
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
UV-blocking fabric treatment, formulation undisclosed
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.
Vague safety claims only
Uses vague language ("eco-friendly", "clean") without a specific PFAS statement.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Volatile organic compounds (VOCs) / solvent inhalation
The carrier solvent for this treatment is not identified on available labeling. Fabric treatments typically use petroleum distillates or alcohols; inhalation during application could pose respiratory irritation if ventilation is inadequate.
Heavy metals
If this product uses mineral UV absorbers like titanium dioxide or zinc oxide, those are not materials linked to PFAS. However, some UV treatments have historically contained antimony or other heavy metals as pigment stabilizers; without ingredient disclosure, this risk cannot be assessed.
Source, FDA ↗Skin or eye irritation from residual treatment
If fabric is not fully dried or rinsed post-treatment, residual solvent or UV-blocking chemicals could irritate skin on first contact. Risk is mitigated by complete drying before use.
Fabric degradation or discoloration over time
Some UV-blocking treatments can cause yellowing, stiffening, or weakening of synthetic fabrics, particularly in high-heat storage or extended sunlight. Atsko does not publish durability or compatibility data for specific fabric types.
What’s reassuring
Formaldehyde / VOCs
No formaldehyde content has been reported for this product. UV-blocking treatments do not typically require formaldehyde chemistry, but absence of disclosure means this cannot be fully ruled out.
Source, ATSDR ↗The full breakdown
What it's made of and why it matters
Atsko U-V Block is a liquid fabric treatment designed to absorb and block ultraviolet radiation on textiles. The exact chemical formulation is proprietary and not publicly disclosed, which limits independent assessment of its safety profile. UV-blocking treatments typically rely on mineral absorbers (titanium dioxide, zinc oxide) or organic UV filters, but Atsko does not specify which approach this product uses. The carrier solvent system and any additives remain unknown, making full hazard characterization impossible from available information.
The brand's record and disclosure
Atsko is an established outdoor fabric treatment company with a long history but minimal transparency on chemical composition or third-party testing. The brand does not publish detailed safety data sheets, material safety certifications, or PFAS testing results on its website or product labeling. No major recalls or safety controversies involving this specific product are documented in public safety databases. However, the brand's silence on PFAS status and ingredient disclosure is a significant red flag in a market where competitors increasingly provide this information.
How it compares in its category
Fabric treatment products range from simple mineral-based UV blockers to complex water-repellent coating (water-repellent coating) coatings that often contain PFAS. Atsko U-V Block is positioned as a UV-only treatment, not a water-repellent, which theoretically reduces PFAS risk compared to traditional water-repellent coating products. However, without ingredient disclosure, direct comparison is difficult. Brands like Nikwax and Granger's offer transparency on PFAS-free formulations for similar outdoor applications, making them more verifiable alternatives.
If you buy it
Apply this product outdoors or in a well-ventilated space to minimize inhalation of solvent vapors; do not apply indoors or in enclosed areas. Test on a small, inconspicuous area of fabric first to check for discoloration or stiffening. Allow treated fabric to dry fully (typically 24 hours) before contact with skin or storage. Store the bottle tightly sealed in a cool, dry place away from children and pets, and follow label instructions for disposal. If brand transparency does not improve, consider switching to a PFAS-free alternative with published ingredient disclosure.
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
- Atsko has made none
Formulations change between production runs, so check the current label. How we grade.
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⚠Starting grade for this product type
West Elm
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Formaldehyde / VOCs
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⚠Starting grade for this product type
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Limited concern
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High concern
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⚠Starting grade for this product type
More outdoor furniture cushion protectants 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.