Ingredient review
PEG/PPG-12/18 Dimethicone
INCI: PEG/PPG-12/18 Dimethicone
A versatile silicone emulsifier that improves texture and spreadability without heavy greasiness.
In plain English
PEG/PPG-12/18 Dimethicone is a silicone ingredient that helps mix water and oil in skincare and makeup. It makes products feel smooth and silky on the skin, spreads easily, and leaves a light, non-greasy finish. Think of it as a helper that keeps your lotion or foundation from separating and gives it a nice, even texture.
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
PEG/PPG-12/18 Dimethicone 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 PEG/PPG-12/18 Dimethicone.
- 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 modified silicone polymer with both water-loving (PEG/PPG) and oil-loving (dimethicone) parts, allowing it to act as an emulsifier. It is synthetically produced and commonly used in cosmetics to stabilize formulas and improve sensory feel.
How it works
It reduces surface tension between water and oil droplets, keeping them mixed together in a stable emulsion. It also forms a thin, breathable film on the skin that helps lock in moisture and gives a smooth, velvety feel without clogging pores.
Pros
Lightweight feel
Leaves a silky, non-greasy finish that works well under makeup or sunscreen.
Stable emulsions
Helps keep water and oil mixed, so your product stays consistent and effective over time.
Cons and cautions
Potential buildup
With frequent use, especially in hair products, it can accumulate and require clarifying washes.
Environmental persistence
As a silicone, it does not break down easily in nature, raising concerns for aquatic ecosystems.
Best for
- People who prefer lightweight, non-greasy moisturizers
- Those using layered skincare routines who want fast-absorbing products
Use caution if
- Individuals with very sensitive skin who react to silicones
- Those seeking fully biodegradable or natural formulations
Usage tips
Safety summary
PEG/PPG-12/18 Dimethicone has a low irritation and comedogenic risk. It is well-tolerated by most skin types, though those with extreme silicone sensitivity may prefer to avoid it. No significant safety concerns have been identified at typical cosmetic concentrations.
Research notes
Research on this specific silicone is limited, but the broader class of dimethicone copolyols is well-studied for safety and efficacy. The Cosmetic Ingredient Review (CIR) has reviewed similar ingredients and found them safe for cosmetic use.
Common label clues
- Typical concentration
- 0.5% to 5% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used.
- Common uses
- Moisturizers, Sunscreens, Foundations, Serums, Hair conditioners
- Environmental note
- Silicones like this one are not readily biodegradable. Some manufacturers are moving toward more eco-friendly alternatives, but it remains widely used for its performance.
Good to know
- PEG/PPG-12/18 Dimethicone is considered safe by major regulatory bodies at typical use levels.
- It is often used in 'water-resistant' sunscreens to improve durability on skin.
Common questions
What is PEG/PPG-12/18 Dimethicone in beauty products?
PEG/PPG-12/18 Dimethicone is a silicone ingredient that helps mix water and oil in skincare and makeup. It makes products feel smooth and silky on the skin, spreads easily, and leaves a light, non-greasy finish. Think of it as a helper that keeps your lotion or foundation from separating and gives it a nice, even texture.
What does PEG/PPG-12/18 Dimethicone do in a beauty product?
It reduces surface tension between water and oil droplets, keeping them mixed together in a stable emulsion. It also forms a thin, breathable film on the skin that helps lock in moisture and gives a smooth, velvety feel without clogging pores.
Is PEG/PPG-12/18 Dimethicone safe for most people?
PEG/PPG-12/18 Dimethicone has a low irritation and comedogenic risk. It is well-tolerated by most skin types, though those with extreme silicone sensitivity may prefer to avoid it. No significant safety concerns have been identified at typical cosmetic concentrations.
Who should be careful with PEG/PPG-12/18 Dimethicone?
Individuals with very sensitive skin who react to silicones Those seeking fully biodegradable or natural 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.