Ingredient review

PEG/PPG-116/66 Copolymer

INCI: PEG/PPG-116/66 Copolymer

A gentle synthetic polymer that helps products spread smoothly and feel lightweight on skin.

beautyskincarefilm-former

In plain English

PEG/PPG-116/66 Copolymer is a synthetic ingredient made from repeating units of ethylene glycol and propylene glycol. In skincare, it acts like a flexible, invisible film that helps other ingredients spread evenly and stay on the skin longer. It also thickens formulas slightly, giving them a silky, non-greasy feel. Because it's a large molecule, it mostly sits on the surface of the skin and does not penetrate deeply, making it very unlikely to cause irritation or clog pores.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

PEG/PPG-116/66 Copolymer is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging PEG/PPG-116/66 Copolymer.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic copolymer created by linking PEG (polyethylene glycol) and PPG (polypropylene glycol) chains. It is a large, water-soluble molecule designed to improve product texture and stability.

How it works

When applied, the copolymer forms a thin, flexible film on the skin's surface. This film helps lock in other ingredients, reduces water loss from the skin (transepidermal water loss, or TEWL), and gives the product a smooth, spreadable texture. It also increases the viscosity (thickness) of a formula, so the product feels richer without being heavy or greasy.

Pros

Lightweight feel

The copolymer creates a silky, non-greasy film that makes products feel comfortable on the skin, especially for oily or combination skin types.

Low irritation risk

Because it is a large molecule that stays on the skin's surface, it rarely causes stinging, redness, or allergic reactions, making it suitable for sensitive skin.

Cons and cautions

Synthetic origin

It is made from petrochemical-derived PEG and PPG, which may be a concern for those seeking natural or biodegradable ingredients.

Surface-only action

The film it forms is purely cosmetic — it does not deliver active ingredients deep into the skin or provide lasting hydration on its own.

Best for

  • Anyone looking for a lightweight, non-greasy moisturizer or serum
  • People with oily or combination skin who want a matte finish

Use caution if

  • Those who strictly avoid synthetic or PEG-based ingredients

Usage tips

Apply products containing this copolymer to slightly damp skin for a smoother, more even spread.
Layer it under sunscreen or makeup — the film can help those products adhere better and last longer.

Safety summary

PEG/PPG-116/66 Copolymer is considered safe for cosmetic use. It has low irritation and comedogenic potential, and no significant toxicity concerns have been identified at typical concentrations. As with all PEG derivatives, there is a theoretical concern about contamination with ethylene oxide or 1,4-dioxane during manufacturing, but reputable brands ensure these impurities are removed to trace levels.

Research notes

Safety assessments by the Cosmetic Ingredient Review (CIR) and other bodies have concluded that PEG/PPG copolymers are safe for topical use. There are no published studies specifically on PEG/PPG-116/66 Copolymer, but the class of ingredients is well-studied and considered low-risk.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG/PPG copolymers and found them safe at typical use concentrations.
Common uses
Serums, Moisturizers, Sunscreens, Makeup
Environmental note
As a synthetic polymer, it is not biodegradable and may accumulate in the environment. However, it is used in very small amounts per product.

Good to know

  • PEG/PPG copolymers are widely used in cosmetics and are generally recognized as safe by global regulators.
  • The numbers 116/66 refer to the average number of repeating units in the polymer chain, which influences its thickness and film-forming ability.

Common questions

What is PEG/PPG-116/66 Copolymer in beauty products?

PEG/PPG-116/66 Copolymer is a synthetic ingredient made from repeating units of ethylene glycol and propylene glycol. In skincare, it acts like a flexible, invisible film that helps other ingredients spread evenly and stay on the skin longer. It also thickens formulas slightly, giving them a silky, non-greasy feel. Because it's a large molecule, it mostly sits on the surface of the skin and does not penetrate deeply, making it very unlikely to cause irritation or clog pores.

What does PEG/PPG-116/66 Copolymer do in a beauty product?

When applied, the copolymer forms a thin, flexible film on the skin's surface. This film helps lock in other ingredients, reduces water loss from the skin (transepidermal water loss, or TEWL), and gives the product a smooth, spreadable texture. It also increases the viscosity (thickness) of a formula, so the product feels richer without being heavy or greasy.

Is PEG/PPG-116/66 Copolymer safe for most people?

PEG/PPG-116/66 Copolymer is considered safe for cosmetic use. It has low irritation and comedogenic potential, and no significant toxicity concerns have been identified at typical concentrations. As with all PEG derivatives, there is a theoretical concern about contamination with ethylene oxide or 1,4-dioxane during manufacturing, but reputable brands ensure these impurities are removed to trace levels.

Who should be careful with PEG/PPG-116/66 Copolymer?

Those who strictly avoid synthetic or PEG-based ingredients

Research sources

Cosmetic Ingredient Review – Safety Assessment of PEG/PPG CopolymersOpenEuropean Chemicals Agency – PEG/PPG Copolymer InformationOpenPubMed – Safety of PEG in CosmeticsOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.