Spf

Drometrizole Trisiloxane

Mexoryl XL — a unique broad-spectrum UV filter from L'Oréal based on silicone. It covers UVB and long-wave UVA (up to 400 nm). Thanks to the silicone tail, it forms an even protective film on the skin and is resistant to sweat and water.

Mexoryl XLL'Oréalbroad spectrumwater-resistant

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Mexoryl XL — a patented L'Oréal UV filter. Structure: benzotriazole (UVB-UVA chromophore) + trisiloxane tail (silicone part). Absorption peaks: ~303 nm (UVB) and ~360 nm (UVA). Oil-soluble. The silicone tail provides: excellent application, an even film layer, water resistance, and a silky skin feel. Maximum concentration in the EU: 15%. Not approved by the FDA (hence often absent in American L'Oréal products). Partnered with Mexoryl SX (terephthalylidene dicamphor sulfonic acid) — together they form the "Mexoryl system" of La Roche-Posay and Lancôme.

La Roche-Posay Anthelios, Lancôme UV Expert, and other top products from the L'Oréal Group. The standard of broad-spectrum protection in French dermatological cosmetics.

Key Benefits

✦

Broad-spectrum protection with UVA I coverage

Drometrizole Trisiloxane covers UVB (280–320 nm) and UVA II+I (320–400 nm) due to two absorption peaks. Particularly effective in the UVA I range (360–400 nm) — an area that is difficult to cover with regular filters. In combination with Mexoryl SX (larger UVA II peak) — complete broad-spectrum coverage from 280 to 400+ nm.

◈

Water resistance and an even film — silicone effect

The trisiloxane tail of the molecule behaves like a silicone emollient: it provides even distribution of the filter across the skin surface, water-resistance, and long-lasting protection retention. Sunscreens with Mexoryl XL maintain effectiveness after swimming and during increased sweating significantly longer than non-silicone-based formulas.

✧

Silky texture without greasiness

The silicone part of the molecule gives sunscreens with Mexoryl XL their characteristic silky texture — excellent cosmetic feel, without greasy shine. This is what distinguishes La Roche-Posay Anthelios from most competitors. Compatible with all skin types, recommended by dermatologists for oily and combination skin.

Suitable for

all skin typesoily skinduring active recreation and swimming

Main Actions

✓ broad-spectrum UVB+UVA protection✓ water resistance✓ even film

Mexoryl XL + Mexoryl SX = La Roche-Posay system

Mexoryl SX (terephthalylidene dicamphor sulfonic acid) — a water-soluble UVA II filter. Mexoryl XL — an oil-soluble UVB+UVA I filter. Together: full coverage from 290 to 400+ nm, all photostable. This is the "secret" of Anthelios and Lancôme UV Expert. A powerful system that allows achieving SPF 50+ with excellent UVA protection and a comfortable texture.

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