Laundry Bar & Stain Remover 1 Bar vs Waterproofing Wax for Leather: which is safer?
Fels-Naptha Laundry Bar & Stain Remover 1 Bar is the clear pick. Nikwax Waterproofing Wax for Leather carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Fels-Naptha
Laundry Bar & Stain Remover 1 Bar
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSkin sensitization or irritation from soap and fatty acids
ReportedFragrance allergens
PossibleResidue buildup on fabrics if over-applied
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 Skin sensitization or irritation from soap and fatty acids, Fragrance allergens, Residue buildup on fabrics if over-applied and Microbial growth on bar if stored wet on the Fels-Naptha 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 Fels-Naptha.
- The Fels-Naptha is soap bar, tallow and plant oils base where the Nikwax is wax-based waterproofing, which is most of the difference in these two grades.
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 →
More fabric stain guard sprays: see the full ranking