303 Protectant · Fabric Stain Guard Sprays
303 Aerospace Protectant
Water repellent composition raises concern. Review the ingredient list.
This silicone-based UV and water protectant for vehicles and outdoor materials raises concerns because water-repellent coatings frequently use fluorinated compounds, but details are withheld.
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Material
Silicone-based protectant with UV inhibitors and water repellent coating
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) from spray carrier
Silicone protectants are typically suspended in hydrocarbon or siloxane solvents that off-gas during and after application. No VOC content limits are published by 303; inhalation during application in confined spaces could cause respiratory irritation.
Siloxane polymer bioaccumulation
Cyclic siloxanes (D4, D5, D6) used in some silicone formulations are volatile and persist in aquatic environments. Exact siloxane profile in 303 Aerospace is not disclosed; runoff from treated vehicles or furniture could accumulate in soil and water over time.
Surface slipperiness hazard
User reports and vehicle maintenance guides document that silicone protectants can create slick buildup on steering wheels, pedals, and furniture seams if over-applied, increasing slip and control loss during use.
Lack of ingredient transparency for UV inhibitors and slip agents
303 does not itemize UV blockers or anti-slip modifiers on the label. These additives may include heavy metals (e.g., titanium dioxide, iron oxides) or allergen-class compounds not flagged for sensitive users.
Aerosol inhalation from spray application
Spray format delivers fine particles and volatile components directly to respiratory tract. Prolonged or poorly ventilated use, especially indoors, poses acute irritation risk; chronic exposure data for this specific formulation is not publicly available.
The full breakdown
What it's made of and why it matters
303 Aerospace Protectant is a silicone-based coating designed to protect vinyl, rubber, plastic, and leather from UV damage and water. The water-repellent function typically relies on hydrophobic chemistry that may include fluorinated compounds (PFAS-class) or siloxane polymers. The UV inhibitor package and slip agents are standard in automotive protectants but are not itemized on the label, which limits transparency about specific chemical exposure.
The brand's record and disclosure
303 Products (owned by SC Johnson) does not publicly disclose PFAS content or commit to PFAS-free formulation on product labels or their website. The brand has not achieved third-party certifications (e.g. No major recalls or safety controversies are on public record for 303 Aerospace Protectant itself, but the parent company's silence on water-repellent chemistry ingredients is notable given widespread PFAS scrutiny in consumer coatings.
How it compares in its category
Silicone-based protectants dominate automotive and furniture care. 303 is mid-market in price and widely used. Alternatives include non-silicone UV-block sprays (e.g., plant-oil based) and wax-only products that avoid water-repellent polymer chemistry entirely. Few competitors in the spray protectant category disclose PFAS status either, making this a category-wide transparency gap rather than a 303-specific failure.
If you buy it
Apply in well-ventilated areas or outdoors to avoid inhaling spray aerosol and volatile silicone carriers. Test on inconspicuous material first (vinyl, plastic) because buildup can leave a slick residue if over-applied. Reapply every 3-6 months depending on sun and moisture exposure. Do not use on steering wheels or grip surfaces where slipperiness poses a safety hazard; avoid contact with skin and eyes.
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
- 303 Protectant has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Fabric Stain Guard Sprays
Nikwax
Waterproofing Wax for Leather
wax-based waterproofing
Respiratory irritation or fume inhalation during application
Limited concern
PFAS
Moderate concern
A water-repellent or grease-resistant treatment of unstated chemistry, with a brand PFAS statement we have not verified.
⚠Waterproof or stain-proof treatment
Timberland
Waximum Waxed Leather Protector
Wax-based leather protector
Volatile organic compounds (VOCs) from solvents
High concern
Formaldehyde / VOCs
Limited concern
Skin sensitization from undisclosed additives
Limited concern
Wax coating lower concern than synthetic waterproofing, but unconfirmed.
⚠Brand says nothing about PFAS
Angelus
Mink Oil Paste Leather Waterproofer and Contitioner 3 oz
mink oil paste, natural oil-based conditioner
Microbial growth (natural oil rancidity)
Limited concern
Skin sensitization (mink oil allergenicity)
Limited concern
Lower concern; natural oil product unlikely to contain PFAS but unverified.
⚠Brand says nothing about PFAS
More fabric stain guard sprays 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.