PS10 Yellow Wax vs Thunderbolt Plus 40: which is safer?
Swix PS10 Yellow Wax is the clear pick. Thunderbolt Plus 40 carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Swix
PS10 Yellow Wax
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleCombustion by-products during hot application
PossibleSkin and eye contact irritation
PossibleIngestion toxicity (accidental exposure)
Thunderbolt Plus 40
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyFluorocarbon inhalation (PFAS precursor)
PossibleDust inhalation during application
Where these two actually differ
- We flag Combustion by-products during hot application, Skin and eye contact irritation, Ingestion toxicity (accidental exposure) and Microabrasive particulates from worn base or scraping on the Swix and not on the .
- We flag Fluorocarbon inhalation (PFAS precursor) and Dust inhalation during application on the and not on the Swix.
- The Swix is Hydrocarbon-based ski wax (paraffin/synthetic blend) where the is wax-based ski base with possible fluorocarbon top coat, which is most of the difference in these two grades.
- The gap is 60 points, wide enough that this is not a close call, and the Swix is the one to buy.
- We are less certain about the grade, at 45% confidence against 72%, because it discloses less.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More ski & sports wax: see the full ranking