Ingredient review

Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone

INCI: BIS-ETHYLHYDROXYCYCLOHEXYL METHACRYLATE DIMETHICONE

A silicone polymer that improves sunscreen performance and water resistance without feeling heavy.

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In plain English

This is a silicone-based ingredient that helps sunscreen ingredients spread evenly and stay put on your skin, especially when you sweat or go in the water. It forms a thin, flexible film that doesn't feel sticky or greasy.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic silicone polymer that combines a methacrylate backbone with dimethicone (silicone) chains. It is designed to improve the uniformity and durability of sunscreen films on the skin.

How it works

When applied, it creates a uniform, water-resistant film that holds UV filters in place, preventing them from clumping or migrating. This helps maintain consistent sun protection over time and during water exposure.

Pros

Boosts sunscreen reliability

Helps UV filters stay evenly spread and water-resistant, so you get more consistent protection during swimming or sweating.

Lightweight feel

Forms a thin, flexible film that doesn't feel heavy or sticky, making sunscreens more comfortable to wear daily.

Cons and cautions

Synthetic origin

As a lab-made silicone, it may not be preferred by those seeking natural or minimal-ingredient routines.

Requires thorough removal

Its water-resistant film can be stubborn; you may need an oil-based cleanser or double cleansing to fully remove it.

Best for

  • Anyone using water-resistant sunscreens for outdoor or beach activities
  • People who prefer lightweight, non-greasy sunscreen textures

Use caution if

  • Those who strictly avoid silicones in their skincare routine

Usage tips

Apply sunscreen containing this ingredient 15 minutes before sun exposure for best film formation.
Remove with an oil-based cleanser or micellar water followed by your regular cleanser to avoid residue.

Safety summary

Generally recognized as safe for topical use in cosmetics. Low irritation and allergy potential. No known systemic toxicity from dermal exposure.

Research notes

Studies focus on its film-forming and water-resistance properties in sunscreen formulations. No significant safety concerns have been raised in published literature or regulatory reviews.

Common label clues

Typical concentration
1–5% in sunscreen formulations
Regulatory status
Approved for use in sunscreens and cosmetics in the US, EU, and other major markets. Not classified as a UV filter itself, but as a formulation aid.
Common uses
Sunscreens, BB creams, Tinted moisturizers, Water-resistant formulas
Environmental note
As a silicone-based polymer, its biodegradability is limited. However, it is not known to bioaccumulate significantly.

Good to know

  • This ingredient is often used in combination with other film formers to boost water resistance.
  • It is considered safe and non-irritating by major regulatory bodies.

Common questions

What is Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone in beauty products?

This is a silicone-based ingredient that helps sunscreen ingredients spread evenly and stay put on your skin, especially when you sweat or go in the water. It forms a thin, flexible film that doesn't feel sticky or greasy.

What does Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone do in a beauty product?

When applied, it creates a uniform, water-resistant film that holds UV filters in place, preventing them from clumping or migrating. This helps maintain consistent sun protection over time and during water exposure.

Is Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone safe for most people?

Generally recognized as safe for topical use in cosmetics. Low irritation and allergy potential. No known systemic toxicity from dermal exposure.

Who should be careful with Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone?

Those who strictly avoid silicones in their skincare routine

Research sources

CosIng - European Commission ingredient databaseOpenPersonal Care Council - Silicones Safety ReviewOpenPubMed - Film-forming polymers in sunscreensOpen

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.