Cyclomethicone
A lightweight, volatile silicone that evaporates leaving a silky feel.
Updated: August 21, 2026
What is Cyclomethicone?
Cyclomethicone is a cyclic silicone compound often found alongside dimethicone in silicone-based lubricants. Unlike linear dimethicone, cyclomethicone has a ring-shaped molecular structure that gives it unique properties—most notably, it's volatile, meaning it slowly evaporates after application.
This evaporative quality is both a benefit and a limitation. On the positive side, cyclomethicone makes silicone lubricants feel lighter and less greasy. It provides initial slip and then partially evaporates, leaving behind a silky, non-tacky residue. This makes cleanup easier compared to lubricants made with dimethicone alone.
In premium silicone lubricants, you'll often find cyclomethicone combined with dimethicone. The cyclomethicone provides the initial lightweight feel while the dimethicone provides lasting lubrication. This combination creates a more sophisticated product with a better overall sensory experience.
However, cyclomethicone has faced some regulatory scrutiny, particularly in Europe, where certain cyclic silicones have been restricted in rinse-off products due to environmental persistence concerns. In leave-on products like lubricants, they remain permitted, but some manufacturers have moved away from cyclomethicone in response to consumer preferences.
Also Known As
Benefits
- Creates a lightweight, non-greasy feel
- Evaporates partially for easier cleanup
- Spreads easily and evenly
- Enhances the texture of silicone products
- Non-irritating and hypoallergenic
Concerns
- Environmental persistence concerns
- Restricted in some EU products
- May evaporate too quickly for some uses
- Not compatible with silicone toys
Scientific Information
Cyclomethicone refers to cyclic siloxanes, typically D4 (cyclotetrasiloxane) or D5 (cyclopentasiloxane). These ring-shaped molecules have lower molecular weights than linear dimethicone, giving them higher vapor pressures and volatility. D5 is most commonly used in cosmetics. While the EU has restricted D4 and D5 in rinse-off products due to bioaccumulation concerns, they remain approved for leave-on products at typical concentrations. Studies show minimal skin penetration and low toxicity. The Cosmetic Ingredient Review has deemed cyclomethicone safe as used in cosmetics.
Frequently Asked Questions About Cyclomethicone
Found In
- • Many premium silicone lubricants
- • Hybrid lubricants
- • Intimate moisturizers