Trimethylsilylamodimethicone

try-METH-ul-SIL-il-AM-oh-dih-METH-ih-kone

Conditioning Agent, Film Former 7/10 Safety Not CGControversial Synthetic Vegan

What Is Trimethylsilylamodimethicone?

A modified amino-functional silicone that selectively deposits on damaged areas of the hair shaft. It provides targeted repair and smoothing where hair needs it most.

Source: Synthetic silicone polymer

Origin: Synthetic

Also known as: Amino-Functional Silicone, Amodimethicone Derivative

What Does Trimethylsilylamodimethicone Do to Your Hair?

Deposits preferentially on damaged and porous sections of hair, providing targeted smoothing and protection. Creates a lightweight film that reduces frizz, adds shine, and improves combability without heavy buildup.

Best For

Damaged hair, frizzy hair, color-treated hair, heat-styled hair, high porosity hair

Not Recommended For

Fine hair (can weigh down over time)

Concentration Matters

1-5% in conditioners and treatments

Hair Type Compatibility

1A Straight Fine
1B Straight Medium
1C Straight Coarse
2A Wavy Fine
2B Wavy Medium
2C Wavy Coarse
3A Curly Loose
3B Curly Tight
3C Curly Corkscrew
4A Coily S-Shaped
4B Coily Z-Shaped
4C Coily Tight
Color-treated: Safe Heat-damaged: Beneficial High porosity: Good

Method Compatibility

Curly Girl (CG) Method: Avoid
CG Avoid

Safety & Regulation

7/10
AvoidCautionSafe

Considered safe for cosmetic use. Not water-soluble so requires sulfate or clarifying shampoo for removal. Low toxicity profile but may contribute to long-term buildup on hair.

FDA Status: Generally Recognized As Safe

FDA permits use in cosmetics. Classified as a safe silicone for topical application.

EWG Score: 3/10

HairAide Verdict

A smart silicone that targets damaged areas rather than coating all hair uniformly. Great for damaged or color-treated hair, but requires periodic clarifying to prevent buildup.

Products That Contain Trimethylsilylamodimethicone

Conditioners, heat protectants, anti-frizz serums, leave-in treatments

Alternatives to Trimethylsilylamodimethicone

If you want to avoid Trimethylsilylamodimethicone, look for products with these ingredients instead:

Amodimethicone, Dimethicone, Cyclomethicone

Frequently Asked Questions

Is Trimethylsilylamodimethicone safe for hair?

Yes, Trimethylsilylamodimethicone has a safety rating of 7/10 and is generally considered safe for use in hair products. Considered safe for cosmetic use. Not water-soluble so requires sulfate or clarifying shampoo for removal. Low toxicity profile but may contribute to long-term buildup on hair.

Is Trimethylsilylamodimethicone bad for curly hair?

Trimethylsilylamodimethicone is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.

Is Trimethylsilylamodimethicone CG-method approved?

No, Trimethylsilylamodimethicone is not approved for the Curly Girl method.

What can I use instead of Trimethylsilylamodimethicone?

Some alternatives to Trimethylsilylamodimethicone include: Amodimethicone, Dimethicone, Cyclomethicone

Get Our Free Ingredient Decoder Cheat Sheet

Take the guesswork out of reading product labels. Our printable cheat sheet helps you decode ingredients while you shop.

Check What's In Your Products

Use our free Hair Product Label Analyzer to check any product's ingredient list instantly.

Analyze My Product →