The best replacement for dimethicone is dimethiconol.

The best alternatives to dimethicone are rated as following:
★★★★★  dimethiconol
★★★★★  simethicone
★★  amodimethicone
★★  polydimethylsiloxane
★  cyclomethicone
★  colloidal oatmeal

Your alternative for dimethicone is not listed? Suggest!
Speaking about dimethicone, one probably shouldn't forget about zinc oxide.

Other search terms related to dimethicone and their ratings are:
★★★★★ zinc oxide
★★★ sunscreen
You have in mind a companion for dimethicone and it is not yet here? Propose!



Google Trends

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dimethicone
dimethiconol
simethicone