Fundamental Aqualight Sun Serum Spf 50+ Pa++++
75/100 overall score
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About this sunscreen
The Fundamental Aqualight Sun Serum SPF 50+ PA++++ is a pure mineral sunscreen using zinc oxide and titanium dioxide. Despite the lightweight name, it is rated with a heavier feel and a high, more visible white cast, which is common for higher-coverage mineral formulas, and it is rated poor as a makeup base. It delivers good protection at a high SPF 50+ rating. With a score of 75.3/100 it is a solid mineral choice for those who prioritize a fully mineral filter set and do not mind some cast.
Ingredient & SPF scores
☀️
UV protection
Good
77
- +41 Zinc Oxide at #2, UV filter (UVA1 +18)
- +33 Titanium Dioxide at #3, UV filter (UVA1 +5)
- −1 UVA2 coverage saturated
- +4 Label claims (SPF 50, PA rating)
👻
White cast
High
7
- +100 Starting score
- −55 Zinc Oxide at #2
- −50 Titanium Dioxide at #3
- −10 Zinc Oxide + Titanium Dioxide together
- −15 Pure mineral formula
- +30 Penalties exceed the scale, floored at 0
- +7 Coated minerals (Alumina)
🪨
Heavy feel
High
20
- +100 Starting score
- −40 Zinc Oxide at #2
- −30 Titanium Dioxide at #3
- −10 Both minerals in the top 3, dual mineral paste
🍄
Fungal acne
Medium
57
- +100 Starting score
- −18 1 polysorbate/sorbitan emulsifiers that feed Malassezia (Sorbitan Isostearate)
- −23 2 long-chain (C12+) esters that feed Malassezia (Polyglyceryl-3 Diisostearate, Glyceryl Tribehenate)
- −2 1 ubiquitous fatty ingredients (Stearic Acid), weak Malassezia signal
👕
Fabric stains
Low
80
- +100 Starting score
- −15 Zinc Oxide at #2, white marks, worst on dark fabric (washable)
- −5 Both minerals present, heavier deposit
💧
Moisture
Nourishing
LightNourishing
- ← 5 Zinc Oxide at #2, mild sebum absorbent
- ← 2 Titanium Dioxide at #3, mild sebum absorbent
- → 10 Glycerin at #6, the anchor humectant
- → 2 Sodium Hyaluronate at #15, hyaluronic family
- → 2 1 strong humectants (Betaine)
- → 2 1 emollient lipids (Squalane)
- → 2 Light emollient/solvent (Caprylic/Capric Triglyceride)
- → 8 Ceramide barrier lipids with cholesterol/phytosphingosine partners
✨
Finish
Balanced
MatteDewy
- ← 2 1 dry-touch emollients reduce greasy shine (Dicaprylyl Ether)
- → 3 1 emollient lipids (Squalane)
💄
Makeup base
Poor
PillsPrimer
- ← 3 Humectant syrup tackiness
- ← 15 High mineral load at #2 greys under foundation
🌊
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.
- ✨ Aloe vera
Full ingredient list (34)
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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Mineral UV filter (Zinc Oxide), high in the list, a primary filter
- ↑ 41 UV protection, incl. long-UVA (UVA1)
- ↑ 15 white marks, worst on dark fabric (washable)
- light ← 5 mild sebum absorbent
- pills ← 15 High mineral load greys under foundation
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Mineral UV filter (Titanium Dioxide), high in the list, a primary filter
- ↑ 33 UV protection, incl. long-UVA (UVA1)
- light ← 2 mild sebum absorbent
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Soothing, skin-conditioning active
-
Emollient, softens and smooths skin
- matte ← 2 dry-touch emollient, anti-shine
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6 Glycerin
Humectant, pulls water into the skin
- 10 → nourishing the anchor humectant
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Emollient, softens and smooths skin
- 2 → nourishing light emollient
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8 Squalane
Emollient, softens and smooths skin
- 2 → nourishing emollient lipid
- 3 → dewy emollient lipid
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Supporting ingredient
-
Emulsifier, keeps oil and water blended
- ↑ 14 feeds malassezia
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Emulsifier, keeps oil and water blended
- ↑ 18 feeds malassezia
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12 Betaine
Humectant, pulls water into the skin
- 2 → nourishing humectant
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Emollient, softens and smooths skin
-
Supporting ingredient
-
Humectant, pulls water into the skin
- 2 → nourishing hyaluronic family
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Botanical extract
-
Botanical extract
-
Botanical extract
-
Botanical extract
-
Botanical extract
-
Botanical extract
-
Botanical extract
-
Botanical extract
-
Botanical extract
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25 Ceramide NP
Soothing, skin-conditioning active
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26 Ceramide AP
Soothing, skin-conditioning active
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Soothing, skin-conditioning active
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28 Tocopherol
Antioxidant, protects the formula and skin
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29 Bisabolol
Soothing, skin-conditioning active
-
Emollient, softens and smooths skin
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31 Stearic Acid
Emollient, softens and smooths skin
- ↑ 2 minor malassezia feeder
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32 Alumina
Supporting ingredient
-
Supporting ingredient
- ↑ 9 feeds malassezia
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Preservative, keeps the formula from spoiling
Does the Fundamental Aqualight Sun Serum leave a white cast?
Yes, white cast is rated high, so it is more visible than many formulas. This is common for higher-coverage pure mineral sunscreens. Darker skin tones may notice it more.
Is the Fundamental Aqualight Sun Serum Spf 50+ Pa++++ mineral or chemical?
It is pure mineral, using only zinc oxide and titanium dioxide. There are no chemical UV filters in the blend. It carries a high SPF 50+ rating.
Is it good for oily or acne-prone skin?
Breakout risk is rated low, which is favorable for acne-prone skin, but the finish is balanced with a heavier feel and it is rated poor as a makeup base. Oily skin may prefer a lighter, more matte option.