C4-24 Alkyl Dimethicone/Divinyldimethicone Crosspolymer
AKA: Silicone Crosspolymer
Synthetic
Occlusive
Skin Conditioner
Silicone
Clean
C4-24 Alkyl Dimethicone/Divinyldimethicone Crosspolymer is a copolymer of C4-24 alkyl dimethicone crosslinked with Divinyldimethicone
CAS #
-
Form
Liquid
State
Solid
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Viscosity Controlling
Locks in moisture
Traditional Use
A crosslinked silicone polymer created for the cosmetics industry in the late 20th century to provide long-lasting slip, water resistance, and improved product texture in cosmetics.
EWG
2
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
ewg-2
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR