A silicone wax. It structures sticks and creams, holds a water-resistant film and helps SPF stay on. Inert to skin.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
A functional silicone wax. Safe.
C30-45 Alkyl Dimethicone (INCI: C30-45 Alkyl Dimethicone) is a silicone wax. In a formula it structures sticks and creams, thickens the oil phase and forms a water-resistant film. That is why it shows up in sunscreens, foundation bases and lip balms where staying power matters. On efficacy, let me be clear about its role: this is a functional texture and wear ingredient, not a skincare active. On its own it does not hydrate or repair. Its real value is helping SPF and pigments stay on the skin longer, which is measurable and useful in water-resistant formulas. It is a topical ingredient with no meaningful absorption, so it is fine to use during pregnancy and breastfeeding. Tolerance is high. Low irritation and allergy potential, suitable for sensitive skin. Silicone waxes are inert and do not clog pores under normal conditions, so oily skin is unlikely to have trouble with it.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
C30-45 Alkyl Dimethicone is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
C30-45 Alkyl Dimethicone suits: normal, dry, combination, oily, sensitive.
A silicone wax.
The INCI name is C30-45 Alkyl Dimethicone. It may also appear as: C30-45 алкил диметикон.
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