The World's Leading Skincare Glossary, brought to you by Lesielle

The 1st Customized Skincare System that Adapts to YOUR Changing Needs


INCI: Quaternium-18 hectorite.

What is Quaternium-18 hectorite?

Quaternium-18 hectorite is formed from quaternary ammonium chloride salt and hectorite obtained from clays. The quaternary ammonium salt is obtained from fatty acids of tallow. It has a gel-like consistency and is used in a variety of cosmetic products.

Use & Benefits:

Quaternium-18 hectorite is used as a suspending and viscosity controlling agent in cosmetic products. In any formulation, the final consistency of the product is very crucial. Quaternium-18 hectorite is a combination of two ingredients- hectorite is a type of clay whereas quaternium is a salt. Clay has a natural tendency to swell when suspended in water. So, it can be used in any product to increase the viscosity of a product.  As a suspending agent, it is used to get the right consistency of the medium, so that suspension like nail polish or liquid lipstick remains uniform in each usage. It also functions as an emulsifier and gives stability to the product. The product with oil and water-based components gets separated into its components. Emulsifier stabilizes the product, prevents separation of the components, and enables even distribution of the product components when used. It is used in formulations of creams, gels, lotions, hair care, and personal 

How to create your own Personalized Skincare with Lesielle?

Icons of the lesielle custom skin care system

Step 1: Select a nourishing base compatible with your skin, and your desired moisturization level

Step 2: Complete your treatment with up to four active ingredients for consistent and occasional use.

Step 3: Insert your base and up to four actives ingredients into your Lesielle device to produce a fresh single dose of face cream on demand when you need it.

Complete your routine with a cleanser and other complimentary products and accessories.


Don't you know what Base and Actives your skin needs?

Take our personalized skincare quiz.

Notice: the information collected here is limited in terms of use and scope. See terms and conditions.

The skincare system for an ever evolving skin, using recognized active ingredients with scientifically proven efficacy to create treatment tailored to each day's State of Skin. 

  • All rights reserved 2023