303 Protectant · Fabric Treatment Sprays
303 Marine Fabric Guard with Trigger Sprayer
Marine guard sprays often use PFAS; 303 discloses nothing. Skip or verify.
303 Marine Fabric Guard is a waterproofing and stain-resistance spray for marine textiles. Brand provides no PFAS disclosure; industry standard for such coatings raises concern.
The safe swap
Griot's Garage
Griot's Interior Detailer
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
proprietary marine fabric protectant spray
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
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.
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.”
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.
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 Fabric Treatment Sprays
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More fabric treatment 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.