Isa Knox UV Sun Pro 365 Extreme Sun Fluid SPF 50+/Pa+++
84/100 overall score
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About this sunscreen
Isa Knox UV Sun Pro 365 Extreme Sun Fluid SPF 50+ is a hybrid fluid combining zinc oxide with modern and older chemical filters, including Diethylamino Hydroxybenzoyl Hexyl Benzoate and Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine. It wears matte and lightweight with low white cast, does not sting, and is generally a good base under makeup with low breakout potential. With a score of 83.9 and excellent protection, it is a strong daily fluid.
Ingredient & SPF scores
☀️
UV protection
Excellent
98
- +7.6 Ethylhexyl Salicylate at #5, UV filter
- +34.2 Diethylamino Hydroxybenzoyl Hexyl Benzoate at #6, UV filter (UVA1 +20.9)
- +17.1 Ethylhexyl Methoxycinnamate at #7, UV filter
- +32.8 Zinc Oxide at #11, UV filter (UVA1 +14.4)
- +14.4 Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine at #21, UV filter (UVA1 +4.8)
- −6.9 UVB coverage saturated
- −4.1 UVA2 coverage saturated
- +3 Label claims (SPF 50, PA rating)
☢️
Health safety
High
64
- +100 Starting score
- −36 Octinoxate at #7 (regulatory/evidence concern)
🤧
Allergens
Low
70
- +100 Starting score
- −18 Fragrance
- −12 Opaque "Fragrance", hidden allergens that can't be checked from the label
👻
White cast
Low
89
- +100 Starting score
- −12 Zinc Oxide at #11
- +0.8 Coated minerals (Triethoxycaprylylsilane)
🔥
Eye sting
Low
75
- +100 Starting score
- −11 Octinoxate at #7, migrates into eyes with sweat
- −6 Octisalate at #5, migrates into eyes with sweat
- −8 Fragrance
🪨
Heavy feel
Low
93
- +100 Starting score
- −8 Zinc Oxide at #11
- +1.2 Volatile hydrocarbon at #2, flashes off
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Fungal acne
Medium
73
- +100 Starting score
- −18 1 polysorbate/sorbitan emulsifiers that feed Malassezia (Sorbitan Olivate)
- −9 1 long-chain (C12+) esters that feed Malassezia (PEG-30 Dipolyhydroxystearate)
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Fabric stains
Low
80
- +100 Starting score
- −15 Uvinul A Plus (DHHB) at #6, oil-soluble UVA filter, fabric stains
- −5 Zinc Oxide at #11, white marks, worst on dark fabric (washable)
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Moisture
Balanced
LightNourishing
- ← 1.5 1 sebum-absorbing powders (Methyl Methacrylate Crosspolymer)
- ← 9 Volatile carriers flash off, leaving a dry finish
- → 4 Glycerin at #10, the anchor humectant
- → 1 1 strong humectants (Panthenol)
- → 2 Humectant polyols
✨
Finish
Matte
MatteDewy
- ← 1 1 sebum-absorbing powders (Methyl Methacrylate Crosspolymer)
- ← 9 Volatile carriers flash off, leaving a dry finish
- ← 3 2 dry-touch emollients reduce greasy shine (Dicaprylyl Carbonate, Isodecyl Neopentanoate)
- → 1 1 emollient lipids (C12-15 Alkyl Benzoate)
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Makeup base
Good
PillsPrimer
- → 4 Quick-setting carrier, fast, even canvas
- → 3 Dry-touch esters, smooth fast-absorbing base
🌊
Water resistance
Not resistant
Non-water-resistantWater-resistant
Nothing flagged in the ingredient list.
How we rate water resistance →Skincare extras
Beneficial actives this formula contains. Informational only, not part of the rating: their effect depends on a concentration the label does not disclose.
- ✨ Niacinamide
Full ingredient list (28)
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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Volatile hydrocarbon, flashes off for a light finish
- light ← 7 volatile carrier, flashes off
- matte ← 7 volatile carrier, flashes off
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Humectant, pulls water into the skin
- 2 → nourishing humectant polyol
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Emollient, softens and smooths skin
- matte ← 2 dry-touch emollient, anti-shine
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Legacy UV filter (Octisalate)
- ↑ 7.6 UV protection
- ↑ 6 migrates into eyes with sweat
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Modern UV filter, broad-spectrum and photostable (Uvinul A Plus)
- ↑ 34.2 UV protection, incl. long-UVA (UVA1)
- ↑ 15 oil-soluble UVA filter, fabric stains
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Legacy UV filter (Octinoxate)
- ↑ 17.1 UV protection
- ↑ 11 migrates into eyes with sweat
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Emollient, softens and smooths skin
- matte ← 1 dry-touch emollient, anti-shine
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Emulsifier, keeps oil and water blended
- ↑ 18 feeds malassezia
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10 Glycerin
Humectant, pulls water into the skin
- 4 → nourishing the anchor humectant
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11 Zinc Oxide
Mineral UV filter (Zinc Oxide), low in the list, likely a minor contributor
- ↑ 32.8 UV protection, incl. long-UVA (UVA1)
- ↑ 5 white marks, worst on dark fabric (washable)
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12 Niacinamide
Soothing, skin-conditioning active
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Volatile silicone, flashes off for a light finish
- light ← 1 volatile carrier, flashes off
- matte ← 1 volatile carrier, flashes off
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Volatile hydrocarbon, flashes off for a light finish
- light ← 1 volatile carrier, flashes off
- matte ← 1 volatile carrier, flashes off
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Emollient, softens and smooths skin
- 1 → dewy emollient lipid
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Thickener and texture, structures the gel or cream
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Mattifying powder, absorbs oil and blurs the finish
- light ← 1.5 sebum-absorbing powder
- matte ← 1 sebum-absorbing powder
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18 Panthenol
Soothing, skin-conditioning active
- 1 → nourishing humectant
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Emollient, softens and smooths skin
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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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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Humectant, pulls water into the skin
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Supporting ingredient
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Thickener and texture, structures the gel or cream
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25 Adenosine
Soothing, skin-conditioning active
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26 Tocopherol
Antioxidant, protects the formula and skin
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Botanical extract
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28 Fragrance
Fragrance
Is the Isa Knox UV Sun Pro 365 Extreme Sun Fluid SPF 50+/Pa+++ good?
It scores 83.9 out of 100 with excellent protection, putting it among the stronger daily fluids in this group.
Does the Isa Knox UV Sun Pro 365 Extreme Sun Fluid SPF 50+/Pa+++ leave a white cast?
White cast is low. Although it contains some zinc oxide, the hybrid fluid wears matte and lightweight, so it generally blends well.
Is it good under makeup?
It rates as a good makeup base, and the matte finish helps foundation sit evenly over it.