Exfoliants

Montmorillonite

Reviewed by Emma · Last updated 18 Aug 2026

Addresses

Oil Control

What Is Montmorillonite?

Type of clay that’s a mix of bentonite (another clay) and fuller’s earth, the latter being a white to brown substance found in sediment. Like all clays, montmorillonite has absorbent properties and can be a helpful ingredient for oily skin. It also functions as a thickener.

How widely it's used

0.3%
of skincare products contain this ingredient — placing it in the top 25% of most-used ingredients.
Most common in: Masks Cleansers

Regulatory information

Standardised cosmetic-ingredient identifiers used by regulators.

Show identifiers
INCI Name
MONTMORILLONITE
EC Number
215-288-5
Function
Absorbent, Bulking, Emulsion Stabilising, Stabilising, Viscosity Controlling

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