Polysilicone-15
INCI · Polysilicone-15 · also Parsol SLX
Overview
An organic UV filter attached to a silicone backbone, which makes the molecule large and keeps it sitting on the skin surface rather than being absorbed. It absorbs in the UVB range and is approved for sunscreen use in the EU and several other regions, though not in the United States.
Who it's for
Sunscreens formulated for markets where it is permitted, often as the partner that lets a formula stay light while still reaching its UVB target.
Cautions
Its filtering range is UVB, so a broad-spectrum product pairs it with UVA filters — the label's broad-spectrum or PA rating, not any single filter name, is what tells you the protection profile. Regional approval differs, so a formula available in one country may not be sold in another.
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What does Polysilicone-15 do in skincare?
An organic UV filter attached to a silicone backbone, which makes the molecule large and keeps it sitting on the skin surface rather than being absorbed. It absorbs in the UVB range and is approved for sunscreen use in the EU and several other regions, though not in the United States.
Is Polysilicone-15 considered safe for skin?
Its filtering range is UVB, so a broad-spectrum product pairs it with UVA filters — the label's broad-spectrum or PA rating, not any single filter name, is what tells you the protection profile. Regional approval differs, so a formula available in one country may not be sold in another.