Repel Bundle Stain & Water Repellent Spray + Refill vs Waterproofing Wax for Leather: which is safer?

Where these two actually differ

• We flag PFAS compounds (non-disclosed), Inhalation risk from spray application, Skin or eye contact from overspray and Bioaccumulation via treated textiles on the Jason Markk 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 Jason Markk.
• The Jason Markk is proprietary water/stain repellent spray coating 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 Jason Markk grade, at 35% confidence against 78%, because it discloses less.