C30-45 Alkyl Dimethicone
A silicone wax. It structures sticks and creams, holds a water-resistant film and helps SPF stay on. Inert to skin.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
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.
Frequently asked questions
Is C30-45 Alkyl Dimethicone safe during pregnancy?
C30-45 Alkyl Dimethicone is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is C30-45 Alkyl Dimethicone for?
C30-45 Alkyl Dimethicone suits: normal, dry, combination, oily, sensitive.
What is C30-45 Alkyl Dimethicone and what does it do in cosmetics?
A silicone wax.
What's the INCI name for C30-45 Alkyl Dimethicone?
The INCI name is C30-45 Alkyl Dimethicone.
See C30-45 Alkyl Dimethicone in a product composition right on the store page
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.
Similar role in the formula
Other functional ingredients
C30-45 Alkyl Methicone, C30-45 Olefin, Caesalpinia Spinosa Gum, Calcium Carbonate, Ethanolamine, Octanediol, Polysilicone-11, Steareth-21
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