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


INCI: Quaternium-15.

What is Quaternium-15?

Quaternium-15 is a quaternary ammonium salt prepared by reaction of hexamethylenetetramine and 1,3-dichloropropene. It is a cream-colored powder with a pungent odor. In addition to its use in cosmetic products, it is also used in the formulation of metal cutting fluids, paints, adhesives, and glues.

Use & Benefits:

Quaternium-15 is used in a wide variety of cosmetic products as a surfactant and preservative. As a surfactant, it lowers the surface tension between two components of the product like two liquids or a liquid and a solid. Lower the surface tension, better mixing capability of that particular ingredient.  It contains a water-loving end and fat-loving core in a single molecule. It attracts dirt, oil, and other impurities accumulated on the surface of the skin with an oil-loving end which then can be washed off easily with water via a water-loving end. It also possesses anti-microbial properties. It kills the microorganism and stops them from coming back by stopping reproduction. It inhibits the growth of molds and fungus in cosmetic products.  It is also used as an anti-static agent. It prevents the build of static charge in the product because of its special chemical structure. It is used in formulations of creams, lotions, gels, make-up products, shampoos, baby products, and other skin and hair care products.

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?

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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. 

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