Dimethicone

Category: Silicone, Emollient, Skin Protectant
Used in: Skincare, lip balms, sunscreen, makeup

INCI

Dimethicone

Typical Usage Levels

• 0.5% – 2% for skin smoothing and lightweight hydration
  
• 2% – 5% for barrier repair, moisture loss prevention, and sensitive skin support
  
• Up to 30% in specific OTC skin-protectant products, as recognized by the U.S. FDA
  

What This Ingredient Does

Dimethicone is a non-volatile, linear silicone known for its excellent skin-protective and smoothing properties. In skincare, it forms a lightweight, air-permeable barrier over the skin’s surface that helps reduce transepidermal water loss while maintaining skin comfort.

Unlike heavy occlusives, dimethicone allows normal skin functions to continue while preventing excessive dehydration. This makes it especially useful for irritated, over-treated, or barrier-compromised skin.

Dimethicone is also widely used in sunscreen formulations, where it helps evenly disperse UV filters such as zinc oxide and titanium dioxide, improving application and uniformity of protection.

Benefits

• Helps prevent moisture loss
  
• Improves skin softness and smoothness
  
• Supports and protects the skin barrier
  
• Enhances product spread and sensory feel
  
• Well suited for sensitive and post-procedure skin
  

Who It’s Suitable For

• All skin types
  
• Dehydrated or barrier-compromised skin
  
• Sensitive or reactive skin
  
• Oily and acne-prone skin seeking non-greasy hydration
  

Note by Dr. Su (M.D. Dermatologist)

Dimethicone is one of the most dependable barrier-supporting ingredients in skincare. When skin is irritated, dehydrated, or over-treated, it helps restore comfort and protect against moisture loss without adding heaviness or irritation.

References

• Journal of Biosciences and Medicines, March 2025, pages 284–292
  
• Military Medicine, November–December 2024, pages e2523–e2529
  
• U.S. FDA Code of Federal Regulations, April 2020
  
• International Journal of Toxicology, May 2014, pages 65S–115S
  
• Journal of Clinical and Aesthetic Dermatology, May 2014, pages 36–44
  
• Dermatologic Therapy, May 2012, pages 229–233
  
• Clinics in Dermatology, May–June 2012, pages 345–348
  
• International Journal of Cosmetic Science, January 2008, pages 19–33
  
• Skin Research and Technology, May 2000, pages 77–80