What Is Diphenyl Dimethicone/Vinyl Diphenyl Dimethicone/Silsesquioxane Crosspolymer?
Diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane crosspolymer is a specialty silicone that comes from linking three different silicone building blocks into a flexible mesh-like network. The backbone includes diphenyl dimethicone and vinyl diphenyl dimethicone units, which carry phenyl groups that boost spreadability and light reflection, combined with silsesquioxane cages that add strength and stability. By crosslinking these monomers chemists create a soft powder that can easily disperse in oils or emulsions without dissolving. The material was first explored in the late 1990s as brands looked for new ways to give formulas a velvety feel without using talc. Scale-up methods rely on controlled platinum-catalyzed hydrosilylation, where the three monomers react in a solvent-free environment, after which the solid polymer is washed, dried then milled to a fine particle size.
This ingredient shows up most often in face primers, liquid and stick foundations, pressed powders, color-correcting creams, highlighters, long-wear sunscreens, mattifying moisturizers and leave-on masks that promise a blurring or soft-focus finish. Because the particles stay on the surface rather than soaking into skin they help cosmetically perfect texture and tone while making formulas easier to apply.
Diphenyl Dimethicone/Vinyl Diphenyl Dimethicone/Silsesquioxane Crosspolymer’s Cosmetic Benefits/Uses
In skincare and makeup this crosspolymer primarily serves one purpose that delivers several visible perks.
- Viscosity controlling – The powder swells slightly in oils and emulsions, thickening the mix so it stays where you put it, preventing runny textures and settling. By fine-tuning flow it creates a cushiony glide that helps pigment and sunscreen filters distribute evenly, which in turn improves coverage, wear time and the overall silky feel of the product.
Who Can Use Diphenyl Dimethicone/Vinyl Diphenyl Dimethicone/Silsesquioxane Crosspolymer
This silicone network is considered non reactive and non sensitising, which makes it a good match for most skin types including oily, combination, normal and sensitive skin. Its lightweight particles sit on the surface rather than blocking pores so even acne-prone users usually tolerate it well. Extremely dry or flaky skin may want additional emollients alongside it because the powdery finish can highlight rough patches if moisture is lacking.
The ingredient is fully synthetic and produced without animal derivatives so it is suitable for vegetarians and vegans.
Because the polymer is a large, inert molecule that does not penetrate the skin it is generally viewed as safe for people who are pregnant or breastfeeding. This is not medical advice and anyone who is expecting or nursing should show the full ingredient list of any product they plan to use to their healthcare provider to be certain it fits their individual situation.
Diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane crosspolymer does not increase photosensitivity and can be worn under sunscreen or makeup during daytime without special precautions.
Potential Side Effects/Adverse Reactions
Individual responses to topical ingredients vary. The points below outline potential side effects associated with diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane crosspolymer. When formulated correctly most users experience none of these issues.
- Mild transient dryness if used in high-powder products on skin that is already dehydrated
- Pore clogging in rare cases when the ingredient is layered with very heavy waxes or oils on extremely oily skin
- Contact irritation in individuals who have a specific sensitivity to silicone materials
- Allergic dermatitis very uncommon but possible due to trace catalyst residues or other formula components rather than the polymer itself
If any redness, itching or discomfort develops stop using the product and consult a qualified healthcare professional.
Comedogenic Rating
Rating: 1/5 – Laboratory data and user experience show that this crosslinked silicone forms a breathable film that sits on top of the skin rather than seeping into pores. Its particle form allows excess sebum to pass through, so it is unlikely to trap oil or bacteria that lead to breakouts. Because it is typically paired with lightweight esters and volatile silicones, the overall pore-blocking risk remains very low.
Suitable for acne-prone or breakout-prone skin. If combined with heavy butters or waxes the finished product could feel more occlusive, so the full formula matters more than the polymer itself.
Summary
Diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane crosspolymer is a specialty silicone network used mainly to control viscosity, give products a silky slip and create a soft-focus blur on the skin. It performs these roles by swelling slightly in oils, increasing thickness, and forming a flexible surface film that scatters light for a smoother look.
While not as famous as dimethicone or cyclopentasiloxane, it has carved out a steady spot in primers, long-wear foundations and high SPF sunscreens that promise a photo-ready finish.
The ingredient is considered low risk: it is inert, non sensitising and rated 1/5 for comedogenicity. Still, everyone’s skin is different so it is wise to patch test any new product that contains it before full-face use.