Uvinul A Plus: the UVA filter behind Korea's lightest sunscreens
Uvinul A Plus is a photostable UVA filter widely used in Korean, Japanese and European sunscreens. It covers the long UVA range associated with pigmentation and photoageing, stays stable in sunlight without needing a stabiliser, and dissolves easily — which is why it appears in so many watery Korean sun fluids.
What it protects against
Its absorption peaks in the long UVA range, the wavelengths most associated with pigmentation, loss of firmness and the cumulative changes grouped under photoageing. UVA passes through window glass and stays relatively constant through the day and year, which is why UVA coverage matters even for indoor days.
Why formulators reach for it
It is photostable on its own, unlike avobenzone, which degrades in sunlight unless it is paired with a stabilising filter. That independence simplifies a formula considerably. It is also oil-soluble and easy to work with, which helps produce the light textures Korean sunscreens are known for.
Where you will and will not find it
Approved and common in Korea, Japan and the EU. Not approved for use in sunscreens in the United States, which is one of the concrete reasons a Korean sunscreen can feel so different from an American one at the same SPF.
How to spot it
On a Korean ingredient list it appears as Diethylamino Hydroxybenzoyl Hexyl Benzoate. The trade name Uvinul A Plus is what you will see discussed in reviews and marketing rather than on the INCI list itself.
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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.