Ingredient review
Bis-Isobutyl PEG/PPG-10/7 Dimethicone Copolymer
INCI: BIS-ISOBUTYL PEG/PPG-10/7/DIMETHICONE COPOLYMER
A gentle silicone emulsifier that improves product texture and stability without clogging pores.
In plain English
This is a silicone-based ingredient that helps water and oil mix together in a product so they don't separate. It also gives a smooth, silky feel when applied to the skin. Because it's a large molecule, it sits on the surface rather than penetrating deeply, which makes it unlikely to cause irritation or breakouts 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
Bis-Isobutyl PEG/PPG-10/7 Dimethicone 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Bis-Isobutyl PEG/PPG-10/7 Dimethicone Copolymer.
- 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 synthetic silicone copolymer modified with polyethylene glycol (PEG) and polypropylene glycol (PPG) chains, designed to act as an emulsifier and surfactant in cosmetic formulations.
How it works
It reduces the surface tension between water and oil phases, allowing them to blend into a stable emulsion. It also helps spread the product evenly and leaves a lightweight, non-greasy film on the skin.
Pros
Gentle on skin
Large molecular size means it stays on the surface, making it unlikely to clog pores or cause irritation for most skin types.
Improves product feel
Creates a smooth, silky application that helps makeup and skincare glide on evenly without a sticky residue.
Cons and cautions
Synthetic origin
Not natural or biodegradable, which may be a concern for those seeking eco-friendly or clean beauty products.
PEG impurity risk
During manufacturing, PEG compounds can be contaminated with ethylene oxide or 1,4-dioxane, though reputable brands purify them to safe levels.
Best for
- Anyone looking for a lightweight, non-greasy moisturizer or primer
- People with oily or combination skin who prefer silicone-based textures
Use caution if
- Those strictly avoiding silicones or PEG compounds
- Individuals with known sensitivity to silicone derivatives (rare)
Usage tips
Safety summary
Generally recognized as safe for topical use in cosmetics. Low irritation and comedogenic risk. As with all PEG compounds, quality control during manufacturing is important to avoid impurities.
Research notes
Limited specific studies on this exact copolymer, but the broader class of dimethicone copolymers is well-studied and considered safe. The CIR panel has reviewed similar ingredients and found no significant safety concerns.
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 copolymers and found them safe as used.
- Common uses
- Moisturizers, Sunscreens, Foundations, Primers, Serums
- Environmental note
- Silicone copolymers are not readily biodegradable, which can contribute to environmental persistence. However, they are used in low concentrations.
Good to know
- This ingredient is often used in 'silicone-based' primers and foundations to create a blurring effect.
- It is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
Common questions
What is Bis-Isobutyl PEG/PPG-10/7 Dimethicone Copolymer in beauty products?
This is a silicone-based ingredient that helps water and oil mix together in a product so they don't separate. It also gives a smooth, silky feel when applied to the skin. Because it's a large molecule, it sits on the surface rather than penetrating deeply, which makes it unlikely to cause irritation or breakouts for most people.
What does Bis-Isobutyl PEG/PPG-10/7 Dimethicone Copolymer do in a beauty product?
It reduces the surface tension between water and oil phases, allowing them to blend into a stable emulsion. It also helps spread the product evenly and leaves a lightweight, non-greasy film on the skin.
Is Bis-Isobutyl PEG/PPG-10/7 Dimethicone Copolymer safe for most people?
Generally recognized as safe for topical use in cosmetics. Low irritation and comedogenic risk. As with all PEG compounds, quality control during manufacturing is important to avoid impurities.
Who should be careful with Bis-Isobutyl PEG/PPG-10/7 Dimethicone Copolymer?
Those strictly avoiding silicones or PEG compounds Individuals with known sensitivity to silicone derivatives (rare)
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.