Piz Buin Mountain Sun Cream spf 50+
80/100 overall score
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Ingredient & SPF scores
☀️
UV protection
Excellent
96
- +8 Ethylhexyl Salicylate at #3, UV filter
- +15.2 Octocrylene at #4, UV filter
- +24 Butyl Methoxydibenzoylmethane at #9, UV filter (UVA1 +12.8)
- +38.4 Methylene Bis-Benzotriazolyl Tetramethylbutylphenol at #12, UV filter (UVA1 +14.4)
- +14.4 Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine at #21, UV filter (UVA1 +4.8)
- +10.8 Diethylamino Hydroxybenzoyl Hexyl Benzoate at #22, UV filter (UVA1 +6.6)
- −5.6 UVB coverage saturated
- −11.6 UVA2 coverage saturated
- +2 Label claims (SPF 50)
☢️
Health safety
High
67
- +100 Starting score
- −30 Octocrylene at #4 (regulatory/evidence concern)
- −3.5 Avobenzone at #9, stacked (regulatory/evidence concern)
🤧
Allergens
Low
67
- +100 Starting score
- −18 Fragrance
- −12 Opaque "Fragrance", hidden allergens that can't be checked from the label
- −3 Photoallergen-tail UV filters (Octocrylene)
🔥
Eye sting
Medium
59
- +100 Starting score
- −8 Avobenzone at #9, migrates into eyes with sweat
- −15 Octocrylene at #4, migrates into eyes with sweat
- −9 Octisalate at #3, migrates into eyes with sweat
- −1 Volatile alcohol at #31
- −8 Fragrance
🪨
Heavy feel
Low
95
- +100 Starting score
- −5 Butyrospermum Parkii Fruit at #11, butter/occlusive fat
🍄
Fungal acne
Medium
41
- +100 Starting score
- −14 1 oils/butters that feed Malassezia (Butyrospermum Parkii Fruit)
- −45 5 long-chain (C12+) esters that feed Malassezia (Glyceryl Stearate, PEG-75 Stearate, PEG-8 Laurate)
👕
Fabric stains
High
22
- +100 Starting score
- −38 Avobenzone at #9, reacts with iron in wash water into rust-yellow stains
- −15 Octocrylene at #4, co-stains alongside avobenzone
- −15 Uvinul A Plus (DHHB) at #22, oil-soluble UVA filter, fabric stains
- −10 Avobenzone + Octocrylene, the classic staining pair
💧
Moisture
Hydrating
LightNourishing
- ← 2 Volatile alcohol at #31
- ← 5 1 sebum-absorbing powders (Silica)
- → 10 Glycerin at #5, the anchor humectant
- → 1 1 strong humectants (Trehalose)
- → 1 Humectant polyols
- → 2 1 emollient lipids (Butyrospermum Parkii Fruit)
✨
Finish
Balanced
MatteDewy
- ← 6 1 sebum-absorbing powders (Silica)
- ← 0.5 Volatile alcohol at #31
- ← 1 1 dry-touch emollients reduce greasy shine (Dicaprylyl Carbonate)
- → 12 2 emollient lipids (Butyrospermum Parkii Fruit, C12-15 Alkyl Benzoate)
💄
Makeup base
Okay
PillsPrimer
- → 3 1 soft-focus powders in moderation
- → 4 Dry-touch esters, smooth fast-absorbing base
- ← 0.5 Gel polymers prone to pilling under friction (Sodium Polyacrylate)
- ← 2 Occlusives/waxes float the foundation
- ← 1.5 Humectant syrup tackiness (partly offset by the base)
🌊
Water resistance
Resistant
Non-water-resistantWater-resistant
- +13 3 film-forming polymers that lock the formula on for water resistance
Full ingredient list (40)
What each ingredient does and how it moves each rating: green helps, red hurts, ↑ / ↓ give the direction, and ← / → shift a slider toward its ends (finish, moisture, makeup base). Auto-derived from our scoring rules and the ingredient's position.
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1 Water
Solvent base, the water phase
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Emollient, softens and smooths skin
- 9 → dewy emollient lipid
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Legacy UV filter (Octisalate), high in the list, a primary filter
- ↑ 8 UV protection
- ↑ 9 migrates into eyes with sweat
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Legacy UV filter (Octocrylene)
- ↑ 15.2 UV protection
- ↑ 15 migrates into eyes with sweat
- ↑ 15 co-stains alongside avobenzone
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5 Glycerin
Humectant, pulls water into the skin
- 10 → nourishing the anchor humectant
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Humectant, pulls water into the skin
- 1 → nourishing humectant polyol
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7 Silica
Mattifying powder, absorbs oil and blurs the finish
- light ← 5 sebum-absorbing powder
- matte ← 6 sebum-absorbing powder
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Emollient, softens and smooths skin
- matte ← 1 dry-touch emollient, anti-shine
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Legacy UV filter (Avobenzone), low in the list, likely a minor contributor
- ↑ 24 UV protection, incl. long-UVA (UVA1)
- ↓ 3.5 stacked (regulatory/evidence concern)
- ↑ 8 migrates into eyes with sweat
- ↑ 38 reacts with iron in wash water into rust-yellow stains
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Film former, locks the formula onto skin for water resistance
- ↑ 7 film former
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Botanical extract
- ↑ 5 butter/occlusive fat
- 2 → nourishing emollient lipid
- 3 → dewy emollient lipid
- ↑ 14 feeds malassezia
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Modern UV filter, broad-spectrum and photostable (Tinosorb M), low in the list, likely a minor contributor
- ↑ 38.4 UV protection, incl. long-UVA (UVA1)
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Thickener and texture, structures the gel or cream
- ↑ 3 film former
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Fatty alcohol, an emollient and thickener, not the drying kind
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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Botanical extract
-
Botanical extract
-
Preservative, keeps the formula from spoiling
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19 Trehalose
Humectant, pulls water into the skin
- 1 → nourishing humectant
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Humectant, pulls water into the skin
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Modern UV filter, broad-spectrum and photostable (Tinosorb S), low in the list, likely a minor contributor
- ↑ 14.4 UV protection, incl. long-UVA (UVA1)
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Modern UV filter, broad-spectrum and photostable (Uvinul A Plus), low in the list, likely a minor contributor
- ↑ 10.8 UV protection, incl. long-UVA (UVA1)
- ↑ 15 oil-soluble UVA filter, fabric stains
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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24 Ceteth-20
Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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25 Steareth-20
Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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Emulsifier, keeps oil and water blended
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Emulsifier, keeps oil and water blended
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28 Linseed Acid
Supporting ingredient
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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Emulsifier, keeps oil and water blended
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31 Alcohol
Volatile alcohol, a drying solvent that can sting eyes
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Thickener and texture, structures the gel or cream
- ↑ 3 film former
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33 Xanthan Gum
Thickener and texture, structures the gel or cream
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Thickener and texture, structures the gel or cream
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Fatty alcohol, an emollient and thickener, not the drying kind
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Chelator, binds stray metal ions to keep the formula stable
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37 Tocopherol
Antioxidant, protects the formula and skin
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Preservative, keeps the formula from spoiling
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Preservative, keeps the formula from spoiling
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40 Fragrance
Fragrance