Methyl Trimethicone
Volatile silicone with light spreadability. Gives a 'silk' slip on skin and evaporates quickly without leaving residue.
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, Oily, Combination, Sensitive
About this ingredient
Methyl Trimethicone is a volatile silicone, a branched analog of cyclomethicone. After application, it evaporates in 10–30 minutes, leaving a thin film. Mechanism. Spreads on skin and hair to form a smooth, dry surface. Leaves no stickiness or weight. Reduces friction in makeup and hair products. Compared with cyclopentasiloxane (D5) – a different volatility profile and no EU regulatory restrictions. Where applied. Primers, foundations, BB creams, hair heat-protection products, dry hair sprays, antiperspirants. Concentration 1–30%. Evidence base. No clinical RCTs needed – a functional filler, an aesthetic modifier. CIR confirmed safety. Safety. Hypoallergenic, non-comedogenic. Pregnancy and lactation – topically safe. Does not accumulate in the body. Volatile silicone controversy. Because of environmental persistence, the EU has restricted D4 and D5 in wash-off cosmetics since 2020 and will restrict D4, D5 and D6 in leave-on cosmetics from 6 June 2027. Methyl trimethicone is not on that list – it is positioned as a safer alternative for the volatile effect in formulas.
Frequently asked questions
Is Methyl Trimethicone safe during pregnancy?
Methyl Trimethicone is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Methyl Trimethicone for?
Methyl Trimethicone suits: normal, dry, oily, combination, sensitive.
What is Methyl Trimethicone and what does it do in cosmetics?
Volatile silicone with light spreadability.
What's the INCI name for Methyl Trimethicone?
The INCI name is Methyl Trimethicone.
See Methyl Trimethicone 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
Methylparaben, Methylpropanediol, Methylsilanol/Silicate Crosspolymer, Mica, Polyglyceryl-6 Dicaprate, Sodium Surfactin, Bis-Phenylpropyl Dimethicone, Dimethyl Isosorbide
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