47155 Scotchgard Auto Fabric and Upholstery Protector vs Waterproofing Wax for Leather: which is safer?

Where these two actually differ

• We flag PFAS in coating (fluorinated water/stain repellents), Spray inhalation and respiratory irritation during application, Residual volatile organic compounds (VOCs) post-application and Contact irritation or allergic sensitization from uncured coating on the 3M 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 3M.
• The 3M is proprietary water and stain-resistant coating on fabric 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 3M grade, at 35% confidence against 78%, because it discloses less.