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Drometrizole Trisiloxane

What Drometrizole Trisiloxane is & what it does

A photostable, oil-soluble broad-spectrum filter (Mexoryl XL) covering UVB and UVA. It is frequently paired with Mexoryl SX to deliver strong, stable protection across the full UV range.

What is Drometrizole Trisiloxane and what does it do in sunscreen?

Drometrizole Trisiloxane is a UV filter, better known by its trade name Mexoryl XL. It is a photostable, oil-soluble filter that absorbs both UVB and UVA, so it helps a sunscreen cover the full ultraviolet range. It is frequently paired with Mexoryl SX to deliver strong, stable broad-spectrum protection.

Is Drometrizole Trisiloxane a UV filter?

Yes. It is a chemical (organic) UV filter, not a moisturizer or preservative. Its standout trait is photostability, meaning it does not break down quickly in sunlight, so the protection holds up during wear. Because it is oil-soluble and covers both UVB and UVA, it is a useful backbone in broad-spectrum sunscreens.

Is Drometrizole Trisiloxane safe?

Yes. Mexoryl XL is an approved UV filter in regions including the EU and is regarded as a well-tolerated, photostable option. It is widely used in established sunscreen ranges and is not associated with common irritation issues for most skin types. As with any UV filter, anyone with a known sensitivity should patch test.

Does Drometrizole Trisiloxane clog pores?

Generally no. It is a UV filter used at controlled levels and is not one of the classic pore-clogging ingredients. As always, the overall feel of a sunscreen comes from the whole formula, so the emollients and oils carrying the filters matter more than the filter itself.

What is Mexoryl XL and is it the same as Drometrizole Trisiloxane?

Yes, they are the same thing. "Drometrizole Trisiloxane" is the INCI name printed on the label, while Mexoryl XL is the trade name you will see in marketing. It is the oil-soluble Mexoryl, and it is often combined with the water-soluble Mexoryl SX for fuller UVA coverage.

Sunscreens with Drometrizole Trisiloxane

We rate 262 sunscreens that contain it, showing the top 10 by overall score:

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