Rug & Carpet Protector 4406-17 PF vs Waterproofing Wax for Leather: which is safer?

Where these two actually differ

• We flag Volatile organic compounds (VOC) and solvent exposure, Perfluorinated compound (PFAS) bioaccumulation and environmental persistence, Formaldehyde-releasing resins in carpet binding and Coating degradation and microfiber shedding on the Scotchgard 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 Scotchgard.
• The Scotchgard is proprietary stain/water-resistant coating, unspecified chemistry 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 Scotchgard grade, at 35% confidence against 78%, because it discloses less.