What Is Polyglyceryl-3/Lauryl Polydimethylsiloxyethyl Dimethicone Crosspolymer?
Polyglyceryl-3/Lauryl Polydimethylsiloxyethyl Dimethicone Crosspolymer is a hybrid molecule that combines a silicone backbone with plant-derived polyglycerin units and a lauryl fatty chain. The silicone part gives it a silky feel while the polyglycerin section adds a touch of water affinity, letting the ingredient sit comfortably between oil and water phases. Manufacturers start with polydimethylsiloxane, graft lauryl groups onto it then link the chains together with allyl polyglyceryl-3 through a controlled chemical reaction known as crosslinking. The result is a three-dimensional network that is stable yet flexible, acting like a microscopic mesh inside a formula.
This material is a fairly recent entry to cosmetic labs, gaining popularity in the early 2000s when brands looked for silicone alternatives that still felt elegant on skin but offered a greener image. By inserting polyglycerin, suppliers could advertise a partially plant-based profile, appealing to the rise of clean beauty marketing.
You will most often meet this ingredient in lightweight moisturizers, makeup primers, sunscreens, BB and CC creams, sheet mask essences and hair styling products that need a smooth slip without feeling greasy. Formulators like it because it plays well with both oils and water, helping them create stable emulsions that spread easily and leave a soft focus finish.
Polyglyceryl-3/Lauryl Polydimethylsiloxyethyl Dimethicone Crosspolymer’s Cosmetic Benefits/Uses
The primary role of this crosspolymer in a cosmetic formula is viscosity control. By swelling slightly in the presence of oils or silicones it thickens the mixture, giving creams and fluids a pleasant body that is neither runny nor heavy. This controlled thickness helps a product stay uniform during storage, improves spreadability during application and supports a smooth even film on skin or hair, which can enhance the feel and appearance of the final product.
Who Can Use Polyglyceryl-3/Lauryl Polydimethylsiloxyethyl Dimethicone Crosspolymer
This ingredient is generally considered suitable for all skin types. Dry and normal skin appreciate the soft, cushioned feel it leaves behind while oily and combination skin benefit from its lightweight texture that does not add extra grease. Sensitive skin usually tolerates it well because silicones are inert and the polyglycerin part is mild, although anyone with a history of silicone sensitivity should stay alert. Extremely acne-prone users may notice clogged pores if they rely on very occlusive routines, so a thorough cleanse at the end of the day is wise.
Because the raw materials used to make this crosspolymer are synthetic or plant-derived, it is typically acceptable for both vegetarians and vegans. Formulas that carry a certified vegan label will have sourced glycerin from non-animal origins and avoided animal testing, so always check brand claims if this is important to you.
Current safety assessments do not flag any issues for people who are pregnant or breastfeeding. The molecule stays on the surface of skin and is not known to penetrate deeply. Still, this is not medical advice; anyone expecting or nursing should run their entire skincare routine past a qualified doctor to be on the safe side.
The crosspolymer does not make skin more sensitive to sunlight and can be worn during the day without boosting the risk of sunburn. It also plays nicely with common active ingredients such as vitamin C, niacinamide and retinoids, making it easy to slip into almost any regimen.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical use of Polyglyceryl-3/Lauryl Polydimethylsiloxyethyl Dimethicone Crosspolymer vary from person to person. The points below list potential issues only; when the ingredient is formulated correctly most people will not experience any problems.
- Mild skin irritation or redness in individuals sensitive to silicones
- Temporary clogged pores or blemishes in very acne-prone skin if the product is not cleansed off thoroughly
- Rare allergic contact dermatitis resulting in itching or rash
- Eye stinging or watering if the product migrates into the eye area
If you notice any of these reactions stop using the product and consult a healthcare professional for guidance.
Comedogenic Rating
Rating: 1/5. The molecule is a large, inert silicone crosspolymer that sits on top of skin and allows water vapor to pass through so it is unlikely to block pores. Its slight thickening action could trap sebum if you already use several heavy layers, which is why it is not given a perfect zero.
Suitability for acne-prone skin: generally fine, most breakout-prone users can use it without issues as long as the rest of the routine is not overly occlusive.
Worth noting, the finished product formula matters more than any single raw material. A lightweight gel with this ingredient will feel very different from a rich balm that contains it alongside waxes or oils that rate higher on the comedogenic scale.
Summary
Polyglyceryl-3/Lauryl Polydimethylsiloxyethyl Dimethicone Crosspolymer acts mainly as a viscosity controller, thickening emulsions just enough to improve spreadability and give a silky, cushiony touch. Its silicone backbone forms a flexible mesh on the surface while the polyglycerin and lauryl segments help it mingle with both water and oil, keeping formulas stable and pleasant to use.
It is not the most famous ingredient on ingredient lists but formulators value it for delivering a luxurious feel that ticks the “cleaner silicone” box, so you will spot it in a growing number of modern moisturizers, primers and sunscreens.
Safety data describe it as low risk, with minimal irritation potential and little chance of pore clogging when used in balanced formulas. As with any new skincare product it is wise to do a quick patch test to make sure your skin gets along with the entire mix of ingredients.