Ethylhexyl Methoxycinnamate (Octinoxate) vs Polysilicone-15: which Korean skincare ingredient?
Ethylhexyl Methoxycinnamate (Octinoxate) vs Polysilicone-15: Ethylhexyl Methoxycinnamate (Octinoxate) leans toward sun damage & photoageing, while Polysilicone-15 targets sun damage & photoageing. Can you use both? Yes — they layer well together.
| Ethylhexyl Methoxycinnamate (Octinoxate) | Polysilicone-15 | |
|---|---|---|
| What it is | For decades the default UVB filter in Asian sunscreens, and still very common in Korean formulas. Market ceilings differ, roughly 7.5 to 10 percent depending on where you are. It is not photostable on its own and gives almost no UVA cover, so what sits beside it in the filter list matters more than the filter itself. | A UV filter attached to a silicone backbone, permitted in Korea and the EU but not in the United States — one small piece of why Korean sunscreens feel the way they do. It absorbs UVB, stays put on skin thanks to its size, and adds almost no weight. Not a UVA filter, so it always travels in company. |
| Best for | Sun damage & photoageing | Sun damage & photoageing |
| When to use | AM | AM |
Which should you choose?
Choose Ethylhexyl Methoxycinnamate (Octinoxate) if your priority is Sun damage & photoageing; choose Polysilicone-15 for Sun damage & photoageing. Many Korean routines use both — yes — they layer well together.
Ethylhexyl Methoxycinnamate (Octinoxate) guide →Polysilicone-15 guide →
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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.