Bis-PEG-20 Dimethicone
AKA: Silicone Modifier, Modified Dimethicone
Synthetic
Skin Conditioner
Hair Care
Silicone
Not Clean
Definition: Bis-PEG-20 Dimethicone is the siloxane polymer that conforms generally to the formula:
CAS #
102783-01-7
Form
Liquid
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
A silicone-based copolymer created for modern cosmetics to enhance product spreadability, water resistance, and conditioning properties in makeup and skincare formulations.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR