What Is Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer?
Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer is a silicone-based ingredient created by linking three different silicone building blocks into a net-like structure. The blend starts with dimethicone, a smooth silicone oil, then combines it with bis-vinyldimethicone and silsesquioxane units. When these parts are reacted together they form a soft yet flexible powder that feels almost velvety on the skin. Most suppliers make it through a controlled polymerization process carried out in closed reactors, followed by drying and milling to get a fine, easy-to-mix powder.
Silicones first showed up in beauty products in the 1950s for their silky feel. Over time chemists learned that crosslinking different silicone pieces could boost performance without adding heaviness. This particular crosspolymer was developed in the early 2000s to give formulas a weightless, blurring finish that classic dimethicone alone could not provide.
You are likely to spot Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer in primers, foundations, tinted moisturizers, leave-on masks, anti-aging creams, sunscreen lotions and even some hair styling products where a soft focus effect is desired. It mixes well with oils, water-based gels and waxes which makes it a favorite for both lightweight daily wear items and richer night treatments.
Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer’s Cosmetic Benefits/Uses
Its main role in a cosmetic formula is skin conditioning, meaning it helps the surface of the skin look and feel better. By forming a thin breathable film it smooths uneven texture, fills in fine lines and leaves a silky after-feel without greasiness. This not only improves the immediate touch of a product but also helps makeup glide on more evenly and last longer.
Who Can Use Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer
This crosslinked silicone suits almost every skin type. Its airy powder texture feels weightless on oily or combination skin yet offers enough slip to ease dryness or flakiness so dry skin usually enjoys it too. Because it is non reactive and free of fragrances and known sensitizers most people with sensitive skin tolerate it, though anyone extremely prone to silicone allergies should proceed with extra care.
The ingredient is produced entirely from synthetic silicone units so it contains no animal derived matter, making it acceptable for vegans and vegetarians. Manufacturing does not rely on animal testing in many regions, though ethical shoppers may still wish to confirm the finished product’s cruelty free status with each brand.
No studies have flagged Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer as unsafe during pregnancy or while breastfeeding since it sits on the surface and is not readily absorbed. That said this is not medical advice and pregnant or nursing users should always review any skincare routine with their doctor before use to be safe.
The polymer does not make skin more sensitive to sunlight and can even enhance the feel of sunscreens, so there is no special photoprotection rule beyond ordinary daily SPF use.
Potential Side Effects/Adverse Reactions
Reactions to topical Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer differ from person to person. The points below outline potential effects that might occur, but they are uncommon when the ingredient is correctly formulated and most users experience none of them.
- Mild redness or irritation in individuals already sensitive to silicones
- Temporary clogged pores or small breakouts if layered heavily with very occlusive products
- Watery eyes or slight stinging if the loose powder form is accidentally blown into the eyes before it is mixed into a product
- Contact dermatitis in the rare case of a true silicone allergy
If you notice any persistent discomfort stop using the product and consult a healthcare professional or dermatologist.
Comedogenic Rating
Rating: 1 out of 5. This crosslinked silicone forms a light breathable lattice on the skin rather than a thick occlusive layer so it is very unlikely to block pores. Its particle structure sits on the surface and does not mix with sebum the way heavier oils can which keeps the risk of congestion low. People prone to acne or breakouts generally tolerate it well. Do keep in mind that finished formulas containing this ingredient may also include richer emollients which could influence the overall pore-clogging potential.
Summary
Dimethicone/Bis-Vinyldimethicone/Silsesquioxane Crosspolymer is a skin-conditioning silicone that delivers a silky soft-focus finish, fills fine lines and helps makeup glide smoothly. It works by creating a flexible micro-mesh film that improves texture without heaviness. Loved by formulators for primers and foundations it enjoys steady but not blockbuster popularity, often chosen when a feather-light blur is needed. Safety data shows a very low irritation and sensitization profile. While issues are rare it is always wise to patch test any new product to make sure your skin stays happy.