Ingredient dictionary

PEG-6

Also listed as: Polyethylene glycol

A short-chain polyethylene glycol, a water-loving polymer used mainly to attract moisture and help dissolve other ingredients. It is on the label of 3 products in our library. Checked against our library November 6, 2026.

What PEG-6 does

Attracts water to the skin's surface
Helps keep ingredients blended in water
Adds a smooth, slightly slippery feel

PEG-6 belongs to the polyethylene glycol family. These are built by joining ethylene oxide units onto a small glycol starter. The 6 in the name means the chain holds, on average, six of those repeating units. Shorter chains like this one are fairly fluid and mix easily with water.

Formulators use it to attract water to the outer skin, which is why it appears in toners. It also helps other ingredients stay blended in water-based formulas and adds a smooth, slightly slippery feel. In cleansers, it can help the product rinse off without leaving a heavy film. Most people find it light and non-greasy.

Good for

Suits a wide range of skin types. Often found in light, water-based toners and gentle cleansers.

Frequently asked questions

Is PEG-6 safe for sensitive skin?

PEG-6 is generally well tolerated and is used in many gentle formulas. Like any ingredient, it can rarely cause irritation in someone with a specific sensitivity. If your skin reacts, stop using the product and check with a dermatologist or doctor.

Does PEG-6 make skin greasy?

Usually not. PEG-6 is water-soluble, so it rinses away easily and does not leave an oily layer like heavy oils do. It is often used in light formulas. Layering it under richer creams is typically fine.