Ingredient review
Dimethiconol Stearate
INCI: DIMETHICONOL STEARATE
A gentle silicone-based emollient that helps products glide on smoothly without clogging pores, making it a good option for sensitive or acne-prone skin.
In plain English
Dimethiconol stearate is a hybrid ingredient that joins a silicone (dimethiconol) with a fatty acid (stearic acid). This makes it a lightweight, non-greasy emollient that spreads easily on the skin and leaves a silky, smooth finish. It's often used in moisturizers and primers to improve texture and help other ingredients apply evenly. Because it's non-comedogenic, it's unlikely to clog pores, which is great for people with oily or acne-prone skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Dimethiconol Stearate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Dimethiconol Stearate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic ester formed by reacting dimethiconol (a silicone polymer) with stearic acid (a fatty acid found in plants and animals). The result is a molecule that has both water-repelling silicone properties and oil-like emollient qualities.
How it works
When applied to the skin, dimethiconol stearate forms a thin, breathable film that reduces water loss (transepidermal water loss, or TEWL) while allowing the skin to feel soft and smooth. It also helps other ingredients spread more evenly and can reduce the sticky or tacky feel of some formulations.
Pros
Non-comedogenic
Unlikely to clog pores, making it safe for acne-prone and oily skin types.
Improves product texture
Helps creams and serums spread smoothly and reduces the sticky feel of other ingredients like glycerin or hyaluronic acid.
Cons and cautions
Not biodegradable
As a silicone derivative, it may persist in the environment longer than plant-based emollients.
Silicone sensitivity
A small number of people may experience irritation or breakouts from silicone-based ingredients, though this is rare.
Best for
- People with oily or combination skin who want a lightweight moisturizer
- Those with sensitive skin looking for a gentle, non-irritating emollient
Use caution if
- Individuals who strictly avoid silicones in their skincare routine
Usage tips
Safety summary
Dimethiconol stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. The Cosmetic Ingredient Review (CIR) panel has reviewed it and found no significant safety concerns.
Research notes
Research on dimethiconol stearate is limited but consistent with other silicone esters. Studies show it is non-irritating and non-sensitizing in human patch tests. Its safety profile is supported by the CIR panel's expert review.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated dimethiconol stearate and found it safe for use in rinse-off and leave-on products at concentrations up to 5%.
- Common uses
- Moisturizers, Serums, Sunscreens, Makeup primers, Hair conditioners
- Environmental note
- As a silicone-based ingredient, dimethiconol stearate may not be readily biodegradable. However, it is not classified as bioaccumulative. Some manufacturers are moving toward more eco-friendly alternatives.
Good to know
- Dimethiconol stearate is often used in 'silicone-free' claims? Actually, it is a silicone derivative, so check labels carefully if you avoid silicones.
- It is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
Common questions
What is Dimethiconol Stearate in beauty products?
Dimethiconol stearate is a hybrid ingredient that joins a silicone (dimethiconol) with a fatty acid (stearic acid). This makes it a lightweight, non-greasy emollient that spreads easily on the skin and leaves a silky, smooth finish. It's often used in moisturizers and primers to improve texture and help other ingredients apply evenly. Because it's non-comedogenic, it's unlikely to clog pores, which is great for people with oily or acne-prone skin.
What does Dimethiconol Stearate do in a beauty product?
When applied to the skin, dimethiconol stearate forms a thin, breathable film that reduces water loss (transepidermal water loss, or TEWL) while allowing the skin to feel soft and smooth. It also helps other ingredients spread more evenly and can reduce the sticky or tacky feel of some formulations.
Is Dimethiconol Stearate safe for most people?
Dimethiconol stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. The Cosmetic Ingredient Review (CIR) panel has reviewed it and found no significant safety concerns.
Who should be careful with Dimethiconol Stearate?
Individuals who strictly avoid silicones in their skincare routine
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.