Waterproofing Wax for Leather vs Sun and Water Shield: which is safer?

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 Scotchgard.
• We flag Volatile organic compounds (VOCs) and inhalation exposure during application, Microparticle/aerosol inhalation during spray application, Coating degradation and textile fiber release and Accumulation on skin or in home dust on the Scotchgard and not on the Nikwax.
• The Nikwax is wax-based waterproofing where the Scotchgard is fluorochemical treatment / durable water repellent coating, 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 42% confidence against 78%, because it discloses less.