Ingredient review
Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer
INCI: DIMETHICONE/BIS-ISOBUTYL PPG-20 CROSSPOLYMER
A silicone polymer that helps products glide on smoothly, feel silky, and stay put without clogging pores.
In plain English
This is a synthetic silicone ingredient that forms a thin, flexible film on the skin. It helps makeup and skincare products spread evenly, feel silky, and resist water or sweat. It is not absorbed into the skin and sits on the surface, so it is generally non-irritating and non-comedogenic for most people.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A crosslinked silicone polymer—meaning the silicone molecules are chemically linked into a larger network. This gives it a soft, elastic texture and the ability to form a breathable film on skin.
How it works
When applied, the polymer spreads into a thin, even layer that dries down to a flexible film. This film helps other ingredients stay in place, reduces the appearance of pores and fine lines temporarily, and provides a smooth base for makeup. It also helps products resist water and sweat.
Pros
Smooth, silky texture
Creates a velvety feel on skin, making products easier to apply and more pleasant to wear.
Improves wear time
Forms a flexible film that helps makeup and sunscreen stay put longer, even in humid conditions.
Cons and cautions
Environmental persistence
As a silicone-based polymer, it is not readily biodegradable and may contribute to microplastic pollution over time.
Can feel heavy for some
On very oily or sensitive skin, the film-forming effect may feel slippery or slightly occlusive, though it is generally well-tolerated.
Best for
- People who want a smooth, pore-blurring finish under makeup
- Those looking for long-wear or water-resistant products
Use caution if
- Anyone who prefers silicone-free or more biodegradable formulations
Usage tips
Safety summary
Generally recognized as safe for topical use. Low irritation and comedogenic potential. Not absorbed into skin. Environmental persistence is the main concern.
Research notes
Limited peer-reviewed studies specifically on this crosspolymer, but silicones as a class have a long history of safe use in cosmetics. The Cosmetic Ingredient Review (CIR) panel has reviewed similar silicone polymers and found them safe at current usage levels.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. No known restrictions at typical use levels.
- Common uses
- Foundations, Primers, Sunscreens, Moisturizers, Long-wear makeup
- Environmental note
- Silicone polymers like this one are not biodegradable and can persist in water systems. Some brands are moving toward more eco-friendly alternatives.
Good to know
- This ingredient is often used in combination with other silicones to adjust texture and feel.
- It is considered safe by major regulatory bodies when used in cosmetics at typical concentrations.
Common questions
What is 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 skincare products spread evenly, feel silky, and resist water or sweat. It is not absorbed into the skin and sits on the surface, so it is generally non-irritating and non-comedogenic for most people.
What does Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer do in a beauty product?
When applied, the polymer spreads into a thin, even layer that dries down to a flexible film. This film helps other ingredients stay in place, reduces the appearance of pores and fine lines temporarily, and provides a smooth base for makeup. It also helps products resist water and sweat.
Is Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer safe for most people?
Generally recognized as safe for topical use. Low irritation and comedogenic potential. Not absorbed into skin. Environmental persistence is the main concern.
Who should be careful with Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer?
Anyone who prefers silicone-free or more biodegradable formulations
Research sources
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.