Polymethylsilsesquioxane vs Jeju Volcanic Ash (Songi): which Korean skincare ingredient?
⏱ 1 min read
⚡ Quick answer: Polymethylsilsesquioxane vs Jeju Volcanic Ash (Songi): Polymethylsilsesquioxane leans toward pores & texture, while Jeju Volcanic Ash (Songi) targets oil control. Can you use both? Yes — they layer well together.
Polymethylsilsesquioxane vs Jeju Volcanic Ash (Songi): Polymethylsilsesquioxane leans toward pores & texture, while Jeju Volcanic Ash (Songi) targets oil control. Can you use both? Yes — they layer well together.
| Polymethylsilsesquioxane | Jeju Volcanic Ash (Songi) | |
|---|---|---|
| What it is | The 'pore filter' effect in a jar, and the reason a Korean primer can make your nose look airbrushed in about four seconds. These are tiny hard spheres that sit on the surface and bounce light in all directions. Nothing is being treated. Wash it off and the pores are exactly as they were. | 화산송이 (hwasan songi) is the reddish porous scoria that covers parts of Jeju, and it became a Korean beauty signature the way volcanic mud did in Iceland — through provenance as much as chemistry. As an oil absorber it works. As proof of anything about Jeju's air or water, it is a story sold with a mask. |
| Best for | Pores & texture, Rough & uneven texture, Oil control | Oil control, Pores & texture, Blackheads & sebaceous filaments |
| When to use | AM | PM |
Which should you choose?
Choose Polymethylsilsesquioxane if your priority is Pores & texture; choose Jeju Volcanic Ash (Songi) for Oil control. Many Korean routines use both — yes — they layer well together.
Polymethylsilsesquioxane guide →Jeju Volcanic Ash (Songi) 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.