Dimethicone
Forms a protective film that helps reduce moisture loss and friction.
Key facts
Dimethicone at a glance.
Helps with
Dryness, friction and barrier protection
Results
Comfort may improve quickly
Skin tolerance
Usually well tolerated
Routine fit
Follow the product directions
At a glance
Top things to know about Dimethicone
- What it is. Silicone skin protectant.
- What it does. Forms a protective film that helps reduce moisture loss and friction.
- What limits the claim. A randomized nursing-home trial tested an entire 3-in-1 cleansing regimen with 3% dimethicone, not isolated dimethicone. Lice treatments use specialized formulas and must not be replaced by moisturizer.
- Choosing a formula. Choose for a smooth protective moisturizer or barrier cream.
More details: strength, timing and precautions
| Bottom line | Choose for a smooth protective moisturizer or barrier cream. |
|---|---|
| Type | Silicone skin protectant |
| What it does | Forms a protective film that helps reduce moisture loss and friction. |
| Best for | Dry Skin; Barrier Support; Diaper Rash |
| Studied concentrations | 1–30% for labelled US skin protectants; a 3% washcloth formula was studied. |
| When to use | Morning or night, as directed by the finished product. |
| Time to results | Comfort may improve quickly; reassess persistent dryness |
| Irritation | Usually comfortable; stop for a new rash and avoid inhaling spray products. |
| Sensitive skin | Choose a simple formula and test a small area first. Individual tolerance matters more than an ingredient’s reputation for being gentle. |
| Available | Cosmetic or OTC products; some high-strength procedures are separate treatments. |
Often used for
What Dimethicone is used for
Dry Skin
Surface protection helps limit moisture loss in skin-protectant products.
Barrier Support
A dimethicone-containing care regimen reduced irritant dermatitis in a trial.
Diaper Rash
Labelled barrier products help protect skin from wetness and friction.
Eczema
The reviewed sources do not establish this ingredient as a treatment for this concern.
Acne
The reviewed sources do not establish this ingredient as a treatment for this concern.
Wrinkles and Fine Lines
The reviewed sources do not establish this ingredient as a treatment for this concern.
HOW IT WORKS
How Dimethicone works
Diagram explanation and sources
Spreads over the skin: Dimethicone forms a smooth surface film. Reduces moisture loss: The film helps protect against irritation and friction.
Schematic illustration; not a measurement of skin penetration. Effects vary with ingredient identity and formulation.
Strengths
Dimethicone strengths
U.S. skin-protectant products use 1–30% dimethicone. Cosmetic moisturizers and specialized lice treatments serve different purposes and should not be placed on one effectiveness ladder.
3%
1–30%
A particular cleansing/barrier washcloth was studied for incontinence-associated dermatitis; it is not a universal ideal percentage.
Used in qualifying skin-protectant products. Choose the labeled purpose and texture, not the upper limit.
Choosing a strength: Look for a finished moisturizer or barrier product intended for the area you are treating.
Higher strengths: A very concentrated product is not automatically better for facial skin. Lice-treatment formulations are not substitutes for moisturizers.
Formula matters: Dimethicone’s viscosity and combination with other ingredients change its feel and function. The name alone does not describe the complete silicone blend.
Forms
Dimethicone forms
Moisturizer
A finished moisturizing base combining water-binding and softening ingredients. Richness varies from light lotions to heavier creams.
Cream
Richer and more moisturizing; often suits dry skin. The full formula still affects comfort.
Primer
A smoothing layer that can leave a silky or slippery finish. Pilling and compatibility with other layers depend on the formula.
Products
Product examples
Neutrogena Hydro Boost
The famous hyaluronic acid gel, in which hyaluronic acid is 15th of 20 ingredients and silicone is second.
First Aid Beauty Ultra Repair Rescue Barrier Balm With Dimethicone
CeraVe Reparative Hand Cream
More products (9)
La Roche-Posay Mela B3 Dark Spot Serum With Melasyl+Niacinamide
La Roche-Posay Hydraphase UV Intense Light SPF 20
La Roche-Posay Hyalu B5 Riche Cream
Olay Regenerist Night Mask
Olay Regenerist Regenerating Moisturizer Day Cream
Olay Pro X Uplifting Line-Fading Serum
Dove Pro Age Care Body Butter
Vaseline UV Protection Sun Stick SPF 50+
Vaseline Pro Derma Repair Snow Melting Cream
How to use it
When to use
Morning or night, as directed by the finished product.
How to apply
Apply a thin layer to clean skin using the amount on the product label.
Moisturizing
Use a simple moisturizer if needed; for rich oils or balms, start with a small amount.
Tolerance
Usually comfortable; stop for a new rash and avoid inhaling spray products.
If it is not working
Reassess persistent dryness, cracking or itch; a rash may need diagnosis.
Sun protection
Use broad-spectrum SPF 30 or higher each morning, especially when treating uneven pigmentation.
What to expect
First few weeks
Skin may feel softer soon after use; relief depends on the formula.
4–8 weeks
Judge hydration, comfort and whether dryness is recurring.
8–12 weeks
Persistent cracking, itch or a rash needs reassessment.
3–6 months
Continue if comfortable; hydration usually requires ongoing use.
6–12 months
Moisturizing does not establish reversal of structural ageing or scars.
What it pairs with
| Ingredient | Use | What to know |
|---|---|---|
| Moisturizer | As needed | Choose a simple formula that improves comfort. |
| Sunscreen | Each morning | Use a tested broad-spectrum product; do not mix other skincare into it. |
| Other active treatments | Introduce separately | Compatibility does not prove an added benefit. Seek a treatment plan when combining medicines. |
Alternatives
Alternatives
Petrolatum
The most effective occlusive there is, and cheaper. Dimethicone seals less completely but feels far lighter, which is the reason people keep using it.
Glycerin
Works the opposite way, by pulling water into the skin rather than holding it in. The two are usually combined rather than chosen between.
Ceramides
Replace the fats the barrier is built from instead of covering it over. Slower, and aimed at the cause rather than the symptom.
Mineral oil
A similar job with a slightly heavier feel, and the same reputation problem for the same non-scientific reasons.
Silicone sheets versus silicone gel
For scars, similar evidence for both. Sheets stay in place longer and suit flat areas that clothing can cover. Gel is easier on the face, on joints, and anywhere a sheet will not stay stuck.
Safety and cautions
Common reactions
Usually comfortable; stop for a new rash and avoid inhaling spray products.
When to stop
Stop for persistent burning, swelling, blistering or a new rash. Seek urgent care for breathing difficulty or a severe allergic reaction.
Sensitive or inflamed skin
Choose a simple formula and test a small area first. Individual tolerance matters more than an ingredient’s reputation for being gentle.
Important limits
Do not use a cosmetic product as a substitute for diagnosis of an unexplained, changing or persistent skin problem.
Pregnancy
It is not absorbed through the skin, which is why people ask. Even so, run anything you use past the doctor managing your pregnancy.
Questions
Questions you might be asking.
What should I choose dimethicone for?
Choose for a smooth protective moisturizer or barrier cream.
How strong is the evidence?
A randomized nursing-home trial tested an entire 3-in-1 cleansing regimen with 3% dimethicone, not isolated dimethicone. Lice treatments use specialized formulas and must not be replaced by moisturizer.
Sources
Sources and further reading
Research updated 2026-10-25. Evidence grades reflect confidence in a specific benefit, not its size.
- A 3-in-1 perineal care washcloth impregnated with dimethicone 3% versus water and pH neutral soap to prevent and treat incontinence-associated dermatitis: a randomized, controlled clinical trial. (2011)
- A highly efficacious pediculicide based on dimeticone: randomized observer blinded comparative trial. (2008)
- FDA skin-protectant monograph
Related
Keep exploring.
Petrolatum
Dry Skin
Ceramides
Glycerin
Eczema
Wrinkles and Fine Lines
Acne
Ceramides vs Dimethicone
Dimethicone vs Glycerin
Dimethicone vs Petrolatum
Colloidal Oatmeal vs Dimethicone
