Dimethicone Crosspolymer is a high-performance silicone elastomer that functions as a sophisticated texture enhancer and film-forming agent. It provides a distinctive silky, powder-like finish to skincare and cosmetic formulas while offering optical blurring of fine lines and pores.
- INCI Name:
- Dimethicone Crosspolymer
- Chemical/Scientific Name:
- Dimethylpolysiloxane, crosslinked
- Common Aliases:
- Silicone Elastomer, Dimethicone/Vinyl Dimethicone Crosspolymer (related blend)
| Category: | Texture Enhancers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0-1 |
| Primary Industries: | Skincare, Color Cosmetics, Sun Care |
| Solubility: | Silicone-dispersible, Insoluble in water |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Sebum Control: | |
| Formula Stability: | |
| Irritation Risk: |
Primary Benefits:
- Creates a smooth, velvet-like skin feel upon application.
- Provides a “soft-focus” effect that blurs imperfections.
- Reduces the tackiness and greasiness of heavy oils or UV filters.
- Matte finish helps manage the appearance of oily skin.
Potential Risks:
- May cause product pilling if used in excess or over incompatible water-based serums.
- Does not provide active biological repair; purely functional and sensory.
Biological Action & Cosmetic Profile
Silicone elastomers differ significantly from linear silicones like Dimethicone due to their three-dimensional crosslinked structure. This molecular architecture prevents the polymer from flowing like a liquid, instead creating a semi-solid gel-like network. When applied to the skin, these elastomers form a breathable, non-occlusive film that remains on the surface. This film fills in the topographical irregularities of the stratum corneum, such as fine lines and enlarged pores, without clogging them.
The chemical structure is highly effective at scattering light, which creates an optical “blurring” effect favored in primers and anti-aging creams. Unlike oils, this polymer has a high affinity for lipids and can absorb small amounts of excess sebum, contributing to a lasting matte appearance. Because the molecules are exceptionally large, they cannot penetrate the skin barrier, ensuring the ingredient remains biologically inert and non-irritating.
Formulators utilize this crosspolymer to stabilize emulsions and thicken the oil phase of a product. It serves as an excellent delivery vehicle for active ingredients, providing a “cushion” that improves the spreadability of potentially gritty substances like Titanium Dioxide or Zinc Oxide. By reducing the surface tension of the formula, it ensures a uniform application of sunscreens and pigments.
Routine Integration
Synergies:
- Dimethicone: Enhances slip and long-wear properties.
- Cyclopentasiloxane: Acts as a volatile carrier to improve the dry-down time.
- Isododecane: Boosts the weightless feel and helps the crosspolymer set quickly.
- Silica: Works in tandem to maximize sebum absorption and matte effects.
Conflicts:
- Heavy water-based serums: Application of high-silicone products immediately after watery serums without drying can lead to pilling.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has repeatedly evaluated silicone crosspolymers and concluded they are safe for use in cosmetic formulations. Clinical data indicates that these polymers are non-sensitizing and non-irritating to both skin and eyes. Because they are non-comedogenic and sit on top of the skin rather than penetrating it, they are frequently recommended for sensitive or post-procedural skin that requires a protective, breathable barrier. Regulatory bodies such as the SCCS (Scientific Committee on Consumer Safety) do not currently restrict this ingredient in topical applications.
Does Dimethicone Crosspolymer clog pores?
No. Despite the “thick” feel of the gel, the molecular structure is large and porous, allowing the skin to “breathe” while remaining on the surface. It is classified as non-comedogenic.
Is this the same as standard Dimethicone?
While related, they are chemically different. Standard Dimethicone is a linear fluid used for slip and moisture, while the crosspolymer is a thickened, elastic network used for texture and blurring.
Why is my product pilling when using this?
Pilling usually occurs when the silicone film is disrupted before it sets, or if it is applied over incompatible water-based products. To prevent this, allow your hydration layers to dry completely before applying a product containing this crosspolymer.