Ingredient dictionary

Polyethylene

Polyethylene is a synthetic polymer, a plastic-type material made from ethylene. Its main job is to add slip, structure and a smooth film. It is on the label of 7 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Polyethylene does

Gives solid sticks their firm structure
Helps makeup glide and feel smooth
Forms a light film on the skin
Helps eyeshadow and eyeliner stay in place

Polyethylene is made by linking ethylene molecules into long chains. It belongs to the same material family as many plastic packaging items, but cosmetic grades are chosen for use on skin. Formulators value it because it stays stable and blends well with waxes and oils.

In eyeshadow and eyeliner, it helps pigment cling to the lid and can help reduce creasing. In deodorant sticks, it adds body so the product holds its shape and glides on without dragging. The texture feels smooth and slightly waxy. It does not dissolve in water, so water alone may not fully remove it; an oil-based cleanser usually helps.

Good for

Suits people who like smooth, long-wearing eye makeup and firm, stick-style deodorants.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is polyethylene a plastic?

Yes, in the sense that it is a synthetic polymer, the same broad material family as plastic packaging. In makeup and deodorant it works as a texture and film builder, not as a packaging material.

Is polyethylene safe for skin?

It is generally well tolerated by most skin types. It sits on the surface rather than soaking in. If any product stirs up redness or itching, stop using it and ask a doctor or pharmacist for advice.