Ingredient review

PEG-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer

INCI: PEG-12 DIMETHICONE/BIS-ISOBUTYL PPG-20 CROSSPOLYMER

A silicone polymer that helps products feel silky, spread evenly, and resist water, but offers no active skincare benefits.

beautyskincarefilm-former

In plain English

This is a synthetic silicone ingredient that forms a thin, flexible film on the skin. It helps makeup and sunscreen stay put longer and feel smooth, but it doesn't moisturize or treat skin conditions.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 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-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer 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-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer.
  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 large silicone molecule (a crosspolymer) modified with PEG (polyethylene glycol) and PPG (polypropylene glycol) chains. It is designed to create a uniform, breathable film on the skin.

How it works

When applied, the polymer spreads into an even layer that adheres to the skin. It helps other ingredients (like pigments or UV filters) stay in place, reduces the greasy feel of oils, and improves water resistance.

Pros

Improves product feel

Gives creams and sunscreens a silky, non-greasy texture that glides on easily.

Boosts wear time

Helps makeup and SPF stay on longer, even in humid or sweaty conditions.

Cons and cautions

No active benefit

This ingredient does not moisturize, soothe, or treat skin—it's purely a texture and film-forming agent.

May require double cleansing

Because it forms a water-resistant film, it can be stubborn to remove with a single cleanser, especially for oily skin.

Best for

  • People who want long-wearing makeup or water-resistant sunscreen
  • Those who enjoy a silky, primer-like finish in their products

Use caution if

  • Anyone who prefers silicone-free or minimalist skincare routines

Usage tips

Use an oil-based cleanser or micellar water first to break down the silicone film before your regular face wash.
Apply products containing this polymer after water-based serums and before heavier creams for best layering.

Safety summary

Low irritation and comedogenic risk. Safe for most skin types when used as directed. No known toxicity concerns at typical cosmetic concentrations.

Research notes

Limited independent studies on this exact polymer, but the broader class of silicone crosspolymers is well-studied and considered safe. Most evidence comes from manufacturer safety data and CIR reviews.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The CIR panel has reviewed similar silicone crosspolymers and found them safe at concentrations up to 15%.
Common uses
Sunscreens, Primers, Long-wear foundations, Water-resistant formulas
Environmental note
Silicone polymers can be persistent in the environment. Some manufacturers are moving toward biodegradable alternatives, but this specific polymer is not known to be biodegradable.

Good to know

  • PEG-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer is considered safe in cosmetics by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
  • It is not absorbed into the skin; it sits on the surface as a film.

Common questions

What is PEG-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer in beauty products?

This is a synthetic silicone ingredient that forms a thin, flexible film on the skin. It helps makeup and sunscreen stay put longer and feel smooth, but it doesn't moisturize or treat skin conditions.

What does PEG-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer do in a beauty product?

When applied, the polymer spreads into an even layer that adheres to the skin. It helps other ingredients (like pigments or UV filters) stay in place, reduces the greasy feel of oils, and improves water resistance.

Is PEG-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer safe for most people?

Low irritation and comedogenic risk. Safe for most skin types when used as directed. No known toxicity concerns at typical cosmetic concentrations.

Who should be careful with PEG-12 Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer?

Anyone who prefers silicone-free or minimalist skincare routines

Research sources

Cosmetic Ingredient Review (CIR) - Safety of Silicone PolymersOpenPubChem - PEG-12 DimethiconeOpenEuropean Commission CosIng DatabaseOpen

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.