303 Fabric Guard 2 oz vs Waterproofing Wax for Leather: which is safer?
Nikwax Waterproofing Wax for Leather is our pick: better on PFAS and on the overall hazard picture.
303 Protectant
303 Fabric Guard 2 oz
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleInhalation of aerosol/silicone particles
ReportedCoating buildup and fabric property changes
PossibleUndisclosed volatile organic compounds (VOCs)
Our pick
Nikwax
Waterproofing Wax for Leather
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleRespiratory irritation or fume inhalation during application
ReportedPFAS in water repellency treatment
Where these two actually differ
- We flag Inhalation of aerosol/silicone particles, Coating buildup and fabric property changes, Undisclosed volatile organic compounds (VOCs) and PFAS presence (separate grade) on the 303 Protectant and not on the Nikwax.
- We flag Respiratory irritation or fume inhalation during application and PFAS in water repellency treatment on the Nikwax and not on the 303 Protectant.
- The 303 Protectant is Silicone-based water and stain repellent coating where the Nikwax is wax-based waterproofing, which is most of the difference in these two grades.
- The gap is 25 points, wide enough that this is not a close call, and the Nikwax is the one to buy.
- We are less certain about the 303 Protectant grade, at 45% confidence against 78%, because it discloses less.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
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