Sunscreen Ranker Independent ranker
KAHI Water Holding Tone Up Sun Serum
KAHI

Water Holding Tone Up Sun Serum

SPF 50+ · PA++++
Our score 90.7 / 100

Fragrance and decyl glucoside add tolerance concerns. Esters, silicone elastomers and film formers support spreadability; tinted mica coverage and clinical safety remain unverified.

Tinted Iron-oxide pigment masks white cast with a sheer skin-tone finish. South Korea
03 The facts, at a glance
Protection
Filter type Mineral filters (zinc oxide, titanium dioxide) sit on skin and reflect UV. Chemical filters absorb UV. Hybrid runs both.
Hybrid
Broad spectrum Covers both UVA and UVB. UVA drives aging and deeper damage; UVB gives you burns.
Yes
Formulation & feel
Texture How it feels going on — milk, gel, cream, spray, stick, essence, lotion, powder, or cushion.
Essence
Finish How it looks once dry: matte, natural, dewy, or glowy.
Natural
Tinted Adds sheer pigment (iron oxides) that masks the white cast common to mineral filters and gives a skin-tone finish.
Yes
fragrance-free No synthetic perfume added. Not FDA-defined in the US; the EU requires 'Parfum' + the 26 named allergens on the label. 'Unscented' is different — it can hide masking fragrance. Botanical oils still scent.
No
Alcohol-free No drying short-chain alcohols (alcohol denat., SD alcohol, ethanol). Doesn't mean fatty alcohols like cetyl or stearyl — those are emollients.
Yes
Where to buy it
YesStyle US In stock
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90.7
Composite score · independent
Ranks #289 of 1759 in the current catalogue. Fragrance and decyl glucoside add tolerance concerns. Esters, silicone elastomers and film formers support spreadability; tinted mica coverage and clinical safety remain unverified.
Composite is a weighted blend: UV 25% · Modernity 10% · Sensitivity 15% · Environment 10% · Elegance 15% · Health 25%. That's the recipe.
The score breakdown
UV protection How hard it blocks UVA + UVB across the spectrum at the stated SPF/PA. 100
Filter modernity Dings legacy filters (octinoxate, oxybenzone); rewards photostable next-gen ones. 96
Sensitivity safety Risk for reactive skin — fragrance, alcohol, and known sensitisers. 75
Reef / env. safety Reef toxicity plus how biodegradable the UV filters and surfactants are. 100
Cosmetic elegance Spread, finish, white-cast, and how it actually feels on skin. 82
Health safety Endocrine concerns and systemic absorption signals across the whole formula. 90
02 Composition · key UV filters 5 filters resolved
UVA-I 340–400nm UVA-I (340–400nm) — covered UVA-II 320–340nm UVA-II (320–340nm) — covered UVB 290–320nm UVB (290–320nm) — covered
Uvinul T 150 Modern Next-gen photostable filter; low irritation profile.
Uvinul A Plus Modern Next-gen photostable filter; low irritation profile.
Mexoryl XL Modern Next-gen photostable filter; low irritation profile.
Bisoctrizole (Tinosorb M) Modern Next-gen photostable filter; low irritation profile.
Titanium Dioxide Mineral Physical filter — sits on skin and reflects UV. Reef-safer.
04 Full ingredient list (INCI) 49 ingredients
MODERN FILTER 4 LEGACY FILTER 1 MINERAL FILTER 1 ADDED FRAGRANCE 1 NATURAL FRAGRANCE 0 ALCOHOL 0 WATCH 0 ACTIVE 5
Water·Dibutyl Adipate· Butyloctyl Salicylate Salicylate-class booster; supports avobenzone. ·Propanediol· Ethylhexyl Triazone Uvinul T 150 — high-efficiency UVB filter. · Diethylamino Hydroxybenzoyl Hexyl Benzoate Uvinul A Plus — modern photostable UVA filter. · Niacinamide Vitamin B3 — barrier + brightening. · Drometrizole Trisiloxane Mexoryl XL · Methylene Bis-Benzotriazolyl Tetramethylbutylphenol Tinosorb M — broad-spectrum, photostable. · Titanium Dioxide Mineral UV filter — physical block; reef-safer. · Glycerin Humectant — the workhorse hydrator. ·1,2-Hexanediol·Caprylyl Methicone·Pentylene Glycol·Sphingomonas Ferment Extract·Nasturtium Officinale Extract·Portulaca Oleracea Extract·Butylene Glycol·VP/Eicosene Copolymer·Coco-caprylate/Caprate·Decyl Glucoside·Dimethicone/Vinyl Dimethicone Crosspolymer·Sodium Polyacryloyldimethyl Taurate·Mica·Methylpropanediol·Polyhydroxystearic Acid·Dimethiconol·Trisiloxane·Polyacrylate Crosspolymer-6·Hydroxypropyl Methylcellulose Stearoxy Ether·Polyester-5· Ethylhexylglycerin Humectant — the workhorse hydrator. ·Polyether-1·Triethoxycaprylylsilane·Aluminum Hydroxide· Adenosine Smoothing active. ·Sodium Stearoyl Glutamate·Sodium Polyacrylate·Xanthan Gum·Poloxamer 188·Polymethyl Methacrylate·Tin Oxide· Tocopherol Vitamin E — antioxidant. ·Dextrin Palmitate·Isopropyl Titanium Triisostearate·CI 77480·Tannic Acid· Fragrance Synthetic fragrance blend — a common irritant. Composition is a trade secret; can include dozens of compounds. Avoid if your skin is reactive. ·Iron Oxides
Source: brand-published INCI. Last verified 2026. Show in detail
01 Water Water
02 Dibutyl Adipate Dibutyl Adipate
03 Butyloctyl Salicylate LEGACY FILTER Salicylate-class booster; supports avobenzone.
04 Propanediol Propanediol
05 Ethylhexyl Triazone MODERN FILTER Uvinul T 150 — high-efficiency UVB filter.
06 Diethylamino Hydroxybenzoyl Hexyl Benzoate MODERN FILTER Uvinul A Plus — modern photostable UVA filter.
07 Niacinamide ACTIVE Vitamin B3 — barrier + brightening.
08 Drometrizole Trisiloxane MODERN FILTER Mexoryl XL
09 Methylene Bis-Benzotriazolyl Tetramethylbutylphenol MODERN FILTER Tinosorb M — broad-spectrum, photostable.
10 Titanium Dioxide MINERAL FILTER Mineral UV filter — physical block; reef-safer.
11 Glycerin ACTIVE Humectant — the workhorse hydrator.
12 1,2-Hexanediol 1,2-Hexanediol
13 Caprylyl Methicone Caprylyl Methicone
14 Pentylene Glycol Pentylene Glycol
15 Sphingomonas Ferment Extract Sphingomonas Ferment Extract
16 Nasturtium Officinale Extract Watercress Extract
17 Portulaca Oleracea Extract
18 Butylene Glycol Butylene Glycol
19 VP/Eicosene Copolymer VP/Eicosene Copolymer
20 Coco-caprylate/Caprate Coco-Caprylate/Caprate
21 Decyl Glucoside Decyl Glucoside
22 Dimethicone/Vinyl Dimethicone Crosspolymer Dimethicone/Vinyl Dimethicone Crosspolymer
23 Sodium Polyacryloyldimethyl Taurate Sodium Polyacryloyldimethyl Taurate
24 Mica Mica
25 Methylpropanediol Methylpropanediol
26 Polyhydroxystearic Acid Polyhydroxystearic Acid
27 Dimethiconol Dimethiconol
28 Trisiloxane Trisiloxane
29 Polyacrylate Crosspolymer-6 Polyacrylate Crosspolymer-6
30 Hydroxypropyl Methylcellulose Stearoxy Ether Hydroxypropyl Methylcellulose Stearoxy Ether
31 Polyester-5
32 Ethylhexylglycerin ACTIVE Humectant — the workhorse hydrator.
33 Polyether-1
34 Triethoxycaprylylsilane Triethoxycaprylylsilane
35 Aluminum Hydroxide Aluminum Hydroxide
36 Adenosine ACTIVE Smoothing active.
37 Sodium Stearoyl Glutamate Sodium Stearoyl Glutamate
38 Sodium Polyacrylate Sodium Polyacrylate
39 Xanthan Gum Xanthan Gum
40 Poloxamer 188 Poloxamer 188
41 Polymethyl Methacrylate Polymethyl Methacrylate (PMMA)
42 Tin Oxide Tin Oxide
43 Tocopherol ACTIVE Vitamin E — antioxidant.
44 Dextrin Palmitate Dextrin Palmitate
45 Isopropyl Titanium Triisostearate Isopropyl Titanium Triisostearate
46 CI 77480
47 Tannic Acid
48 Fragrance ADDED FRAGRANCE Synthetic fragrance blend — a common irritant. Composition is a trade secret; can include dozens of compounds. Avoid if your skin is reactive.
49 Iron Oxides Iron Oxides