What Is Polyurea Crosspolymer-2?
Polyurea Crosspolymer-2 is a man-made polymer created when bis(isocyanatomethyl)benzene links up with trimethylolpropane, then the resulting network is reacted with guanidine carbonate. The process yields a tightly crosslinked structure that acts as a flexible yet durable film on the skin. The ingredient was first explored in the early 2000s when formulators were hunting for alternatives to traditional film formers like acrylates. Its ability to form a smooth breathable layer without a heavy feel quickly earned it a place in cosmetic labs.
Production starts with carefully measured blends of the two starting materials under controlled heat, followed by the guanidine step that locks the matrix together. The finished powder is sieved for uniform particle size then added to water- or oil-based formulations.
You will spot Polyurea Crosspolymer-2 in sheet and rinse-off masks, long-wear makeup, anti-aging serums, lightweight moisturizers, hair-setting sprays and transfer-resistant sunscreens. Wherever a brand wants a thin flexible film that sticks around without flaking this polymer often makes the shortlist.
Polyurea Crosspolymer-2’s Cosmetic Benefits/Uses
Formulators reach for this ingredient mainly because it is an efficient film former. Once applied it creates an invisible mesh that helps hold other actives in place, improves water resistance, boosts wear time and gives products a smooth elegant feel. For makeup it reduces smudging and fading. In skincare it slows down evaporation so the skin stays hydrated longer while still feeling light and breathable.
Who Can Use Polyurea Crosspolymer-2
Polyurea Crosspolymer-2 is generally suitable for all skin types including dry, normal, combination and oily skin because the film it forms is lightweight and breathable rather than heavy or greasy. Extremely acne-prone or congested skin may want to monitor how it feels, as any film former can in rare cases trap excess oil if cleansing is inadequate.
The polymer is synthesized entirely from laboratory chemicals and contains no animal derived materials, so it is considered vegan and vegetarian friendly.
Current safety data do not flag any specific risks for pregnant or breastfeeding women when the ingredient is used topically at the levels found in cosmetics. This is not medical advice and anyone who is pregnant or nursing should still discuss all skincare products with a qualified healthcare professional to be on the safe side.
Polyurea Crosspolymer-2 does not increase photosensitivity and will not make skin more prone to sunburn. It also has no known interactions with common active ingredients such as retinoids, AHAs or vitamin C, so it plays well in layered routines.
Potential Side Effects/Adverse Reactions
Side effects from topical Polyurea Crosspolymer-2 can vary from person to person. The points below describe potential reactions, though they are uncommon when the ingredient is used correctly by the product manufacturer and most users will not encounter them.
- Mild skin irritation – Slight redness or itching can occur in sensitive individuals if the formulation is heavily loaded with the polymer
- Contact allergy – Very rare but possible if someone is sensitized to residual monomers used during production
- Breakouts – A small number of acne-prone users may notice clogged pores if the product is not fully removed at the end of the day
- Eye irritation – Sprays or aerosols containing the polymer can sting if mist drifts into the eyes
If any persistent irritation, rash or other unwanted reaction develops stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1/5
Polyurea Crosspolymer-2 sits on the skin as a lightweight breathable film and is not an oily or waxy material, so it has very little tendency to clog pores. A rating of 1 acknowledges that any film former could, in rare cases, trap sebum if the product is not fully removed but overall the risk is low.
Most acne-prone users should find it suitable, provided they cleanse thoroughly.
Because the polymer is highly purified the chance of pore-clogging impurities is minimal, further supporting its low rating.
Summary
Polyurea Crosspolymer-2 is mainly valued as a film former that locks active ingredients in place, boosts water resistance and creates a smooth flexible finish without heaviness. Its crosslinked structure lets it form a thin mesh that keeps moisture in while allowing skin to breathe.
The ingredient enjoys steady but niche popularity, showing up most often in long-wear makeup, sunscreens and sheet masks where a durable yet weightless film is useful.
Current data show it is safe for topical use with a very low irritation profile. As with any new skincare ingredient it is wise to patch test a product first to make sure it suits your individual skin.