303 Protectant · Fabric Stain Guard Sprays
303 Marine Fabric Guard with Trigger Sprayer
Marine guard sprays often use PFAS. 303 discloses nothing.
Waterproofing and stain-resistance spray for marine textiles. Brand provides no PFAS disclosure. Industry standard for such coatings raises concern.
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Material
proprietary marine fabric protectant spray
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.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Inhalation of spray mist and propellant
Aerosol products carry inherent risk of inhaling fine particles and propellant gases during application. 303 does not specify propellant type or particle size on consumer packaging, limiting ability to assess respiratory risk fully.
Volatile organic compounds (VOCs) and off-gassing
Solvent-based fabric protectants typically contain VOCs to dissolve and deliver active ingredients. No VOC emissions data has been published by the manufacturer, though short-term odor during and after application is commonly reported by users.
Skin and eye contact irritation
The proprietary polymer and solvent blend may cause irritation if sprayed directly on skin or eyes. Standard precautions (gloves, eye protection) are recommended but not prominently featured on consumer packaging.
Aquatic toxicity from runoff
Water-repellent compounds, particularly fluorinated formulations, accumulate in aquatic environments. No ecotoxicity data is provided by 303; marine users should apply this product away from water sources and allow treated fabrics to dry thoroughly before water contact.
Incomplete ingredient disclosure and verifiability
Consumer-grade 303 Marine Fabric Guard does not disclose a full ingredient list, preventing independent assessment of specific chemical hazards. This lack of transparency is common in the industry but limits informed consumer choice regarding allergens, sensitizers, or emerging contaminants.
The full breakdown
What it's made of and why it matters
303 Marine Fabric Guard is a proprietary spray formulation designed to repel water and UV damage on marine textiles, canvas, and synthetic fabrics. The exact chemical composition is not publicly disclosed by the manufacturer. Marine fabric protectants in this category typically contain water-repellent polymers and silicone-based compounds; many brands in this segment have historically relied on fluorinated chemistry (PFAS) to achieve durable water and stain resistance, though 303 has not publicly confirmed or denied this practice.
The brand's record and disclosure
303 Products (owned by Plasti Dip International) does not publish detailed ingredient lists or safety data sheets for consumer versions of this product on its website. The company has not issued public statements regarding PFAS content or absence in its fabric guards. No independent recalls or safety violations specific to this product are on record. Brand transparency on chemical composition remains limited compared to competitors offering third-party certifications or full ingredient disclosure.
How it compares in its category
Marine fabric protectant sprays vary widely in their reliance on fluorinated water-repellents. Some competitors (e.g., Scotchgard Marine) have moved toward fluorine-free formulations in recent years; others remain silent on PFAS use. 303's market position as a mid-range, widely distributed product means it competes on ease of application and durability rather than on transparent chemical safety. No independent testing comparing PFAS levels across brands in this category has been published to date.
If you buy it
Apply in well-ventilated outdoor areas or in a spray booth; inhalation of fine mist should be minimized. Test on a small, inconspicuous area first to confirm color fastness and compatibility with your specific fabric. Reapply every 12-18 months depending on exposure and washings. Store the trigger sprayer upright in a cool, dry place and replace the nozzle if it clogs; the propellant may separate over time. If PFAS content is critical to your decision, contact 303 Products directly for technical documentation before purchasing.
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
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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
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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
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Microbial growth (natural oil rancidity)
Limited concern
Skin sensitization (mink oil allergenicity)
Limited concern
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⚠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.