Waterproofing Wax for Leather vs Carpet Clean Up Foamer: which is safer?
Shout Carpet Clean Up Foamer is the clear pick. Nikwax Waterproofing Wax for Leather carries a failing PFAS grade, and we never recommend buying a failing product.
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
Our pick
Shout
Carpet Clean Up Foamer
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
ReportedFragrance allergens and skin/respiratory irritation
PossibleSurfactant residue on fibers and skin contact
ReportedPropellant inhalation (butane or propane)
Where these two actually differ
- We flag Respiratory irritation or fume inhalation during application and PFAS in water repellency treatment on the Nikwax and not on the Shout.
- We flag Fragrance allergens and skin/respiratory irritation, Surfactant residue on fibers and skin contact, Propellant inhalation (butane or propane) and PFAS in surfactants or water-repellent additives (brand undisclosed) on the Shout and not on the Nikwax.
- The Nikwax is wax-based waterproofing where the Shout is surfactant-based foam cleaner formulation, which is most of the difference in these two grades.
- We are less certain about the Shout grade, at 35% 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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