What Is Dimethicone Crosspolymer-3?
Dimethicone Crosspolymer-3 is a specialty silicone ingredient made by crosslinking dimethicone with an ethylenebis silane so the liquid silicone turns into a soft three-dimensional mesh. Once formed this network is ground into a fine powder or gel-like matrix that blends smoothly with water or oil phases. Because it starts from silica-derived silicone oils it is considered synthetic. Silicones entered skin care in the 1950s for their silky touch then formulators learned that crosslinking them produced new textures and longer-lasting skin feel, which led to the creation of Dimethicone Crosspolymer-3 in the early 2000s.
The ingredient is produced in closed reactors where dimethicone chains react with a bifunctional silane in the presence of a catalyst and gentle heat. The resulting crosslinked polymer is washed and filtered to remove small residues, then milled into the desired particle size or dispersed into a carrier fluid.
You will most often find Dimethicone Crosspolymer-3 in primers, moisturizers, lightweight facial oils, anti-aging serums, BB creams, leave-on hair masks and mattifying sunscreens. Its powdery yet cushiony feel helps these products spread easily and leave a soft finish.
Dimethicone Crosspolymer-3’s Cosmetic Benefits/Uses
Dimethicone Crosspolymer-3 is classified as a skin conditioning agent, meaning it helps keep the skin feeling comfortable and looking smooth. In a formula it forms a breathable film that locks in moisture without a greasy after-feel, fills in tiny surface lines for an instant blurring effect and imparts a silky slip that makes makeup glide on evenly.
Who Can Use Dimethicone Crosspolymer-3
This ingredient suits most skin types including dry, normal, combination and oily because its lightweight film helps hold water without leaving residue. Very acne prone or highly sensitive skin may want to monitor how it feels since any film former can sometimes trap sweat or bacteria on reactive complexions.
Dimethicone Crosspolymer-3 is a fully synthetic silicone made from silica derived compounds so it contains no animal material. That makes it acceptable for vegans and vegetarians provided the finished product itself is certified cruelty free.
Current research shows no known risks for pregnant or breastfeeding women when Dimethicone Crosspolymer-3 is used on the skin. Still this is not medical advice and anyone who is expecting or nursing should check with a doctor before adding new products.
The polymer does not increase photosensitivity and will not interfere with sunscreen filters. It also has no known interactions with common skincare acids or retinoids other than possibly slowing their absorption because of its water-repellent film.
Potential Side Effects/Adverse Reactions
How each person responds to Dimethicone Crosspolymer-3 can vary. The points below describe potential but uncommon reactions when the ingredient is applied topically in a finished cosmetic that has been properly formulated. Most users will not notice any of these issues.
- Mild skin irritation
- Rare allergic contact dermatitis
- Temporary clogged pores or breakouts in very acne prone skin
- Pilling when layered with high levels of water soluble actives
If any discomfort or reaction develops stop using the product and seek guidance from a healthcare professional.
Comedogenic Rating
Rating: 1 / 5
Dimethicone Crosspolymer-3 sits at the low end of the comedogenic scale because its crosslinked structure forms a lightweight breathable film that is less likely to settle into pores than heavier straight chain oils. The particles are too large to penetrate follicular openings, and they spread thinly so buildup is minimal. However the film can still trap sweat or sebum on very reactive skin, which is why it earns a 1 instead of 0.
Most acne prone users tolerate this ingredient well but those with easily congested skin should keep an eye on how their complexion responds when using products that contain it.
Formulators often combine Dimethicone Crosspolymer-3 with mattifying powders like silica or zinc which can further reduce any pore clogging potential by absorbing excess oil.
Summary
Dimethicone Crosspolymer-3 conditions skin by creating a soft focus mesh that locks in moisture, smooths surface lines and gives products a silky cushiony glide. Its crosslinked silicone network stays on top of the skin, providing long lasting slip without greasy weight.
The ingredient is popular in primers, light moisturizers and hybrid makeup skin care products, though it is not yet as widespread as standard dimethicone because it costs more and requires special processing.
Safety data show very low irritation or sensitization risk when used as directed. Still, every skin is unique so it is wise to patch test any new product that contains Dimethicone Crosspolymer-3 before rolling it into a full routine.