Perfluorooctyl Triethoxysilane

What is Perfluorooctyl Triethoxysilane?

Perfluorooctyl triethoxysilane is a synthetic fluorosilane compound consisting of a perfluorooctyl chain linked to a triethoxysilane moiety. This chemical structure enables it to act as a surface modifier in cosmetic formulations. It finds typical application in color cosmetics, including pressed powders, eyeshadows, foundations, and lipsticks. In products, it functions through hydrolysis of its ethoxy groups into silanols, which bond to the surfaces of inorganic fillers like pigments, mica, or silica. This forms a thin fluorosiloxane layer that repels water and oils, boosting ingredient dispersibility, product stability, and adhesion to skin for extended wear without compromising texture.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 4 View on EWG →

PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Binder

Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.

Binding

Provides cohesion by helping ingredients stick together, improving the strength and integrity of pressed powders, tablets, or solid bars.

Benefits

Strengthens bonds between solid particles for durable compacts and powders

Promotes even pigment distribution and smooth application

Imparts hydrophobic properties to resist moisture and enhance longevity

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
Users of long-wear makeup products like foundations and powders	Those sensitive to silicone-derived ingredients
Individuals seeking smudge-resistant color cosmetics	Individuals preferring fluoride-free formulations
People with oily skin preferring water-repellent finishes	Users concerned about limited long-term safety data

Safety Notes

Approved for cosmetic use by regulatory databases with defined functions
Non-comedogenic, unlikely to clog pores

Frequently Asked Questions about Perfluorooctyl Triethoxysilane

What role does it play in cosmetics?

It acts as a binder, linking particles for stronger, more cohesive products like powders and sticks.

Is it suitable for all skin types?

Its non-comedogenic nature suits most, but those sensitive to silicones may prefer alternatives.

How does it improve makeup performance?

By creating a water-repellent layer on particles, it enhances adhesion and resistance to smudging.