What Is Dimethicone/Peg-10 Crosspolymer?
Dimethicone/PEG-10 Crosspolymer is a hybrid ingredient that merges dimethicone, a silicone well known for its silky slip, with PEG-10, a water-loving polyethylene glycol chain. The two parts are chemically linked in a three-dimensional network, giving the final material properties of both oil and water compatibility. It is created through a crosslinking reaction where dimethylpolysiloxane chains are bonded to diallyl PEG-10 under controlled heat and catalysts. This process yields a soft, powdery silicone elastomer that disperses easily in oils or water-based mixes.
Silicones entered beauty formulas in the late 1950s as lightweight alternatives to heavy plant oils. Over time chemists sought versions that felt less greasy and blended more easily with water. The introduction of silicone-PEG crosspolymers in the early 2000s met this need, and Dimethicone/PEG-10 Crosspolymer became a favorite for its balanced feel and compatibility with many actives.
You will spot this ingredient in lightweight moisturizers, primers, anti-aging serums, sheet mask essences, sunscreens, color-cosmetics like foundations and BB creams, wash-off cleansers and even scalp treatments where a non-oily silky finish is desired.
Dimethicone/Peg-10 Crosspolymer’s Cosmetic Benefits/Uses
Formulators reach for this crosspolymer because it tackles multiple tasks at once, cutting down on the number of raw materials needed.
- Skin conditioning: Forms a breathable film that smooths rough patches and leaves skin feeling soft and protected from water loss
- Emollient: Adds slip and a cushiony afterfeel so creams glide on without greasiness improving user experience
- Cleansing: Helps trap dirt and makeup so they rinse away more easily in wash-off products leading to a thorough yet gentle cleanse
- Emulsifying: Bridges oil and water phases stabilizing lotions and serums which keeps them from separating on the shelf
- Viscosity controlling: Thickens formulas into elegant gels or velvety creams allowing brands to fine-tune texture without heavy waxes
Who Can Use Dimethicone/Peg-10 Crosspolymer
This silky silicone blend is generally suitable for all skin types including oily, dry, combination and sensitive skin since it forms a light breathable film that does not trap heat or sweat. Extremely acne-prone users who find any occlusive layer troublesome may prefer lighter formulas though most people tolerate it well.
Dimethicone/PEG-10 Crosspolymer is made entirely from lab-created building blocks and contains no animal-derived matter so it is appropriate for vegans and vegetarians.
Current safety data show no specific risks for women who are pregnant or breastfeeding, yet this is not medical advice. Anyone who is expecting or nursing should run every skincare product past a qualified physician just to be on the safe side.
The ingredient does not make skin more sensitive to sunlight, so it is not classed as photosensitising. It also plays nicely with other common actives like vitamin C, niacinamide and retinoids making it an easy addition to most routines.
Potential Side Effects/Adverse Reactions
Side effects from topical use of Dimethicone/PEG-10 Crosspolymer can vary from person to person. The following points list potential reactions, yet they are uncommon and most users will not experience them when the product is formulated and used as intended.
- Mild skin irritation or redness in very sensitive individuals
- Temporary clogged pores if layered heavily with other rich products
- Rare allergic contact dermatitis marked by itching or small bumps
- Build-up on hair or scalp leading to dullness if not cleansed thoroughly
- Slight eye stinging if the product migrates into the ocular area
If you notice any of the reactions above stop using the product and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 1/5
Dimethicone/PEG-10 Crosspolymer forms a lightweight breathable film that tends not to block follicles the way heavier oils or waxes can, earning it a low score of 1. Its large molecular structure sits on the surface rather than sinking into pores, so most acne-prone users should find it suitable. In leave-on products layered with very occlusive ingredients it could contribute to congestion for extremely sensitive skins, but on its own the risk is minimal.
The ingredient is also non-nutritive to acne bacteria, which further reduces the likelihood of breakouts.
Summary
Dimethicone/PEG-10 Crosspolymer conditions skin, acts as a silky emollient, helps cleanse by lifting grime, stabilises oil-water blends as an emulsifier and fine-tunes thickness for smooth gel or cream textures. It performs these jobs by combining a water-friendly PEG chain with a slippery silicone network that spreads easily and holds formulas together.
The crosspolymer has gained steady popularity since the early 2000s, showing up in everything from primers to sunscreens because it delivers a luxe feel without a greasy finish.
Current research finds it safe for regular topical use with a very low irritation profile. As with any new cosmetic, give it a quick patch test before full application just to be on the safe side.