Ingredient dictionary

PEG-8

Also listed as: Polyethylene glycol

A small, water-loving synthetic polymer that helps formulas hold moisture and keeps oil and water ingredients blended. It is on the label of 8 products in our library. Checked against our library November 6, 2026.

What PEG-8 does

Attracts and holds water in the formula
Acts as a solvent for other ingredients
Gives a smooth, non-greasy skin feel

PEG-8 is a polyethylene glycol, a synthetic polymer made by linking many small ethylene oxide units into one chain. The number in its name shows the average chain length, so it sits in the short, light end of the PEG family. It is made from petroleum-based starting materials and processed for cosmetic use.

Formulators use it because it attracts and holds water, so it helps products feel hydrated and stay smooth. It also dissolves and blends other ingredients, which keeps clear formulas stable. In deodorants it often helps the product spread evenly without leaving a heavy film, and in micellar water it helps keep the formula clear and easy to wipe off.

Good for

Suits most everyday formulas, including deodorants and micellar waters, since it is light and well tolerated by most people.

Frequently asked questions

Is PEG-8 safe for skin?

PEG-8 is widely used in cosmetics and is generally well tolerated by most people. As with any ingredient, a person with very sensitive skin or a known reaction may want to patch test a new product first. If irritation happens, stop using the product and ask a dermatologist.

Does PEG-8 clog pores?

PEG-8 is a light, water-loving ingredient. Pore clogging depends on the whole formula, not one ingredient, so check the full list if your skin breaks out easily.