303 Products Automotive Protectant vs Waterproofing Wax for Leather: which is safer?

Where these two actually differ

• We flag Volatile organic compounds (VOCs) and solvent off-gassing, Skin and eye irritation from undisclosed surfactants or additives, Polymer coating degradation and microparticle shedding and Accidental ingestion risk from residue on high-touch surfaces on the 303 Protectant 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 303 Protectant.
• The 303 Protectant is UV protectant coating, polymer-based 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 303 Protectant grade, at 35% confidence against 78%, because it discloses less.