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ISA KNOX

ISA KNOX UV Sun Pro 365 Extreme Sun Fluid

Ingredient analysis and how the ad lines read

Read on 2026-09-30

What is this product?

A 100 mL Korean sun fluid, SPF50+ PA++++, with a thin transparent finish and a hybrid filter set: four organic filter entries (ethylhexyl salicylate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine) plus zinc oxide, in a 34-entry list that opens with water and isododecane. A fragrance entry is present and six allergen-named entries follow it. The brand badges whitening, wrinkle-care and UV-protection functions, but the statutory notice on a group mall set page lists a not-applicable value for the functional review. No exfoliating acid is listed and no entry carries an acid suffix.

What makes it different?

A fragrance-bearing hybrid sun fluid whose brand-page function badges (whitening, wrinkle care) are not confirmed by the notice table on the group mall set page, so the printed ingredient list and the SPF and PA label are the dependable parts. The waterproof wording rests on a footnoted 10-adult sweat protocol with no printed result.

What is in it?

The full ingredient list as the brand publishes it, in the printed order. Each name links to what we know about that ingredient.

This brand publishes its ingredient list in Korean only. Names below are the matching INCI names from the Korean Cosmetic Association ingredient dictionary, except 2 with no dictionary entry, left in Korean.

Worth a closer look

Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.

Did the ad claims hold up?

We checked 21 lines this product advertises against the ingredient list and public documents. Here is how they read: likely, not proven: 4 · partly backed: 8 · overstated ad line: 2 · no source confirms it: 6 · says nothing: 1.

Claims translated from Korean, originals preserved.

likely, not proven4

  • Ultra-slim, ultra-adhesive sun fluid that sticks right to the skin
    Korean original

    피부에 착 붙는 초슬림 초밀착 선플루이드

  • #UltraAdhesive
    Korean original

    #초밀착

  • The moment you apply, it sticks! Light and thinly applied
    Korean original

    바르는 순간 착!붙고 가볍고 얇게 발리는

  • A fluid texture that adheres thinly and transparently the moment it touches the skin
    Korean original

    피부에 닿는 순간 얇고 투명하게 밀착되는 플루이드 텍스처

partly backed8

  • It applies lightly and, with a high UV blocking index, protects the skin more powerfully, an Extreme Sun Fluid product suitable for use these days.
    Korean original

    가볍게 발리면서 높은 자외선 차단 지수로 보다 강력하게 피부를 보화여 요즘 사용하기에 적격인 익스트림 선 플루이드 제품입니다.

  • #UltraFineDustBlocking
    Korean original

    #초미세먼지차단

  • #StrongAgainstWaterAndSweat
    Korean original

    #물과땀에강한

  • The moment you apply, stick! Light and fast photoaging care
    Korean original

    바르는 순간 착! 가볍고 빠르게 광노화 케어

  • OK even when it meets sweat and water, OK even in sauna-like weather
    Korean original

    땀과 물을 만나도 OK 사우나 같은 날씨에도 OK

  • *Ultra-fine dust blocking, a reassuring skin keeper
    Korean original

    *초미세먼지 차단으로 안심 피부 지킴이

  • It blocks harmful fine dust so that it adheres less to the skin, protecting the skin even in environments where fine dust is a concern.
    Korean original

    유해한 미세먼지가 피부에 부착이 덜 되도록 막아 미세먼지가 걱정되는 환경에서도 피부를 보호해줘요.

  • SPF 50+/PA++++/Waterproof

overstated ad line2

  • Smart sun care that manages everything at once, from photoaging care to anti-aging
    Korean original

    광노화 케어부터 안티에이징까지 한 번에 관리하는 스마트 선 케어

  • With waterproof & *sweatproof functions, it can tightly defend against UV without gaps in any situation.
    Korean original

    워터프루프 & *스웨트프루프 기능으로 어떠한 상황에서도 빈틈없이 자외선을 밀착 방어할 수 있어요.

no source confirms it6

  • UV protection functionality
    Korean original

    자외선차단기능성

  • Whitening functionality
    Korean original

    미백기능성

  • Wrinkle improvement functionality
    Korean original

    주름개선기능성

  • #TripleFunctionality
    Korean original

    #3중기능성

  • Not only UV protection, but with wrinkle improvement and whitening functionality, it cares for the signs of skin aging caused by UV exposure.
    Korean original

    자외선 차단 뿐만 아니라 주름 개선 및 미백 기능성으로 자외선에 노출되어 생기는 피부 노화 징후를 케어해줘요.

  • With skin-like lipid structure ingredients and a low-viscosity formula, it quickly adheres to the skin and stays light with no stickiness even when reapplied several times.
    Korean original

    피부 유사 지질 구조 성분과 낮은 점도의 포뮬라로 빠르게 피부에 밀착되고 여러 번 덧발라도 끈적임 없이 가벼워요.

says nothing1

  • The moment you apply, stick! Stick-on heat sun
    Korean original

    바르는 순간 착! 착.붙 열로썬

Each line is quoted as the brand published it, and each one was read on its own against the ingredient list and the documents the brand publishes.

How we read these lines