What Is Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone?
Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone is a silicone-based polymer created by linking dimethicone units with methacrylate groups that carry an ethylhydroxycyclohexyl side chain. The backbone gives it the glossy slip characteristic of silicones while the methacrylate portions let the ingredient cure into a flexible film on skin or hair. It is synthesized in a controlled laboratory process where dimethicone chains are first functionalized with methacrylate monomers then further reacted with ethylhydroxycyclohexyl components to fine-tune viscosity and film strength. Silicones entered beauty formulas in the 1950s for their smooth feel and water resistance yet this specific hybrid is newer, appearing in the past decade as brands searched for breathable films that move with skin. You will usually spot it in long-wear foundations, tinted moisturizers, leave-on hair serums, waterproof mascaras, sheet masks and certain anti-aging primers where a lightweight, flexible seal is needed.
Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone’s Cosmetic Benefits/Uses
This ingredient is prized for one key role in formulas: its film forming ability. Once applied, it sets into an invisible, flexible layer that locks in moisture, boosts product longevity and helps pigments stay put. The resulting film is thin and breathable so makeup looks fresh longer, skincare acts like a moisture seal and hair treatments gain humidity resistance without feeling heavy or sticky.
Who Can Use Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone
This silicone film former is considered gentle and non sensitizing so it suits most skin types including dry, normal and combination. Oily or acne-prone users generally tolerate it as well since the molecule is too large to sink into pores though extremely clog-prone skin might prefer lighter textures if a formula feels overly occlusive. Its smooth finish is also friendly to mature and sensitive skin because it can soften the look of fine lines without causing stinging.
The ingredient is fully synthetic with no animal derivatives so products using it are usually acceptable for vegetarians and vegans unless other animal-derived materials are present in the same formula.
Current safety data show no reproductive toxicity and very low skin absorption which means pregnant or breastfeeding women can typically use products containing this polymer. This is not medical advice and anyone who is pregnant or nursing should ask a healthcare professional before adding new cosmetics just to be sure.
Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone does not increase sensitivity to sunlight and has no known interactions with common actives like retinol or acids. It can be layered comfortably under sunscreens and makeup without affecting their performance.
Potential Side Effects/Adverse Reactions
Reactions to topical Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone vary from person to person. The effects listed below are possible but uncommon when the ingredient is used at normal cosmetic levels in well-formulated products.
- Mild temporary redness or itching in very sensitive individuals
- Occlusive feel that may contribute to a greasy sensation on extremely oily skin
- Rare contact dermatitis in those with a specific silicone allergy
- Build-up on hair shafts leading to dullness if cleansing is inadequate
If any irritation or discomfort occurs discontinue use and consult a medical professional if symptoms persist.
Comedogenic Rating
Rating: 1/5. Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone is a large silicone-based polymer that sits on the surface of skin, creating a breathable film rather than sinking into pores. Its molecular size and smooth spreadability make it unlikely to trap dead skin cells or sebum, so the risk of clogged pores is low. As a result it is generally suitable for acne-prone or breakout-prone skin, though individual tolerance can vary. Since it is hydrophobic it may mingle with excess oil if cleansing is inadequate, so thorough removal at the end of the day is helpful.
Summary
Bis-Ethylhydroxycyclohexyl Methacrylate Dimethicone is mainly valued for one job: forming a thin flexible film that locks in moisture keeps makeup in place and gives hair products humidity resistance. It does this by linking dimethicone chains with methacrylate groups that cure into a soft mesh on skin or hair, providing slip, shine and staying power without feeling heavy.
While not a household name, it shows up in many modern long-wear foundations, waterproof mascaras and leave-on treatments where brands want a comfortable yet durable finish. Safety tests rate it as low risk with minimal absorption and little chance of irritation for most users. Still, whenever you try a new product containing this or any unfamiliar ingredient, patch test on a small area first to check personal compatibility.