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Isntree Hyaluronic Acid Watery Sun Gel SPF50+ tube
Isntree

Hyaluronic Acid Watery Sun Gel SPF50+ PA++++

Sunscreen 50 ml
9.6OUT OF 10
Great formula

Formula has a high safety profile. Suitable for most skin types.

41
Safe
1
Caution
0
Higher risk

Score breakdown

Safety10/10
Barrier support10/10
Acne-safe9/10
Active treatment7.1/10

Our verdict

This sunscreen's filter system is a modern, well-chosen combination — Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine (Tinosorb S) and Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (Tinosorb M) alongside Ethylhexyl Salicylate and Homosalate, giving genuine broad-spectrum SPF50+ PA++++ coverage from newer, more photostable filters than many older Western formulas use. What earns the 'no whitecast' claim on the tube is the watery-gel base built around silicones (cyclopentasiloxane) for a fast, invisible finish. Behind the sunscreen function, the formula is unusually generous with skincare actives for a sun product: seven or eight distinct hyaluronic acid forms at varying molecular weights for genuine multi-depth hydration, ceramide NP and centella asiatica for barrier and calming support, niacinamide, and astaxanthin as a supplementary antioxidant. It reads like a proper hydrating serum with SPF layered on top rather than a bare-bones sunscreen with a marketing hydration claim bolted on. The honest caveats: some of the filters used (Tinosorb S and M specifically) are not FDA-approved for sale in the US, so cross-border buyers should check current import regulations, and as with any sunscreen, the SPF rating only holds if you apply a full, generous layer — a thin application of even an excellent filter system underperforms its label. For daily wear under makeup on skin that wants hydration and sun protection in one step, it's a genuinely well-formulated option.

At a glance

What it does
hydrationsoothingbarrier supportbrightening
Best for
sensitive skinacne-prone skindry and dehydrated skinmost skin types
Not enough for

Key ingredients

Niacinamideevens skin tone and strengthens the barrierCeramide NPreinforces the protective barrierCentella Asiatica Extractsoothes and supports skin recoverySodium Hyaluronateintensely hydrates

Full ingredient list (43)

WaterButylene GlycolEthylhexyl SalicylateHomosalateDibutyl AdipateNiacinamideBis-Ethylhexyloxyphenol Methoxyphenyl TriazineCyclopentasiloxaneMethylene Bis-Benzotriazolyl TetramethylbutylphenolPolysilicone-15Diethylamino Hydroxybenzoyl Hexyl Benzoate1,2-HexanediolPentylene GlycolPinus Pinaster Bark ExtractCeramide NPCentella Asiatica ExtractGlycerinPortulaca Oleracea ExtractHouttuynia Cordata ExtractOlea Europaea Fruit OilFicus Carica (fig) Fruit ExtractSodium HyaluronateCeteth-10Hydrogenated LecithinDecyl GlucosidePropanediolTocopherolAstaxanthinHyaluronic AcidSodium Hyaluronate CrosspolymerAscorbyl Propyl HyaluronateHydrolyzed Hyaluronic AcidHydroxypropyltrimonium HyaluronateAcrylates/c10-30 Alkyl Acrylate CrosspolymerSodium Acetylated HyaluronateHydrolyzed Sodium HyaluronateAdenosineXanthan GumCetyl Peg/ppg-10/1 DimethiconeTromethamineCarbomerPropylene GlycolEthylhexylglycerin

Colour indicates our safety assessment for each ingredient — green is well-tolerated, amber warrants caution, red is higher-risk. Tap any ingredient to read its full profile.

Frequently asked

Is this sunscreen legal to buy and use in the US?
It's manufactured and sold in South Korea using filters (including Tinosorb S and M) that are approved there and across much of Asia and Europe, but not all of them are FDA-approved for sale in the United States. If you're buying it from outside Korea, it's worth checking your country's current import and regulatory status for these specific filters.
Does this sunscreen really not leave a white cast?
The filter system (chemical, not mineral) combined with a lightweight, silicone-based watery gel base is specifically formulated to avoid the white or grey cast that mineral filters like zinc oxide can leave, especially on deeper skin tones. Reviewers and the brand's own marketing both emphasize this as a key feature of the formula.
Can this replace my moisturizer?
For some skin types on milder days, possibly — it contains multiple forms of hyaluronic acid, ceramide NP and centella asiatica, giving it genuine hydrating and barrier-support properties beyond a typical sunscreen. Very dry skin will likely still want a separate moisturizer underneath, especially in colder or drier conditions.
What is the score based on?
The score comes from the same Pure Moonlight ingredient analyzer used across the whole site. It weighs safety, barrier support, acne and comedogenic risk, and active-ingredient strength, so this product's score is directly comparable to any ingredient page here.

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