Grandma's Rub-On Laundry Stain Stick vs Waterproofing Wax for Leather: which is safer?
Grandma's Rub-On Laundry Stain Stick is the clear pick. Nikwax Waterproofing Wax for Leather carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Grandma's Secret
Grandma's Rub-On Laundry Stain Stick
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSurfactant-derived skin irritation
PossibleFragrance allergens
PossibleDegradation and residue buildup on fabric
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 Surfactant-derived skin irritation, Fragrance allergens, Degradation and residue buildup on fabric and Contamination from hand transfer during use on the Grandma's Secret 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 Grandma's Secret.
- The Grandma's Secret is Soap-based laundry stain stick, solid bar 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