Isoamyl Laurate

Overview

Isoamyl laurate is a plant-derived ester made from coconut-derived lauric acid combined with isoamyl alcohol (typically from fermented sugar). The result is a clear, colourless, fluid liquid with essentially no scent and an exceptionally dry, silicone-like skin feel.

It belongs to the family of “natural silicone alternatives” — ingredients designed to replace volatile silicones (like cyclopentasiloxane) and standard dimethicone in formulas that want a natural certification or a plant-sourced label without giving up the slick, weightless feel that silicones bring.

Shelf life is 2-3 years stored cool and dark. The ester structure is very stable.

It is approved under most natural cosmetic standards (COSMOS, Ecocert) and is often used at 5-20% in clean beauty formulas where the formulator wants the silicone aesthetic without the silicone itself.

What it does in a formula

The ester structure gives a very low viscosity and a fast, dry-feeling spread on skin and hair. On the skin it acts like a “second skin” feel — soft, blurring, weightless. On hair it smooths the cuticle and adds shine without weight.

It is also a strong solubilizer for oil-soluble actives, fragrances, and pigments. Mineral and colour pigments disperse smoothly in isoamyl laurate, which is why it shows up in clean-beauty foundations, BB creams, and primers.

It is not occlusive in any meaningful way. Treat it as a feel-modifier, dispersion aid, and silicone alternative rather than a moisturizing ingredient.

How to use

Add to the oil phase. Tolerates heat-and-hold to 80 C. Can also be added in the cool-down without issue.

Usage rates by product type:

• Face serums (silky finish): 5-20%
• Face creams and lotions: 3-15%
• Foundations and BB creams: 10-30%
• Pigment dispersion: up to 50% as the dispersion base
• Primers: 5-20%
• Hair leave-ins and serums: 3-15%
• Body lotions (light feel): 3-15%
• Cleansing balms: 5-15%

Best for / Worst for

Best for: silicone replacement in clean-beauty formulas, foundations and pigmented makeup, hair smoothing serums, primers, lightweight blurring face creams, anywhere you want a “skin like glass” finish from a natural ester.

Worst for: rich moisturizers (it adds no real emollience), occlusive balms, very dry mature skin formulas that need a heavier oil base.

Common pitfalls

Expecting moisturization. Isoamyl laurate gives a great feel but does not seal moisture in or condition the skin. Always pair with a real emollient or occlusive if dry skin is the target.

Wrong percentage for silicone swap. A 1:1 swap from dimethicone often gives a slightly different finish — dimethicone has more of a “powdered” feel, isoamyl laurate is more “wet-look slick.” Test on small batches.

Sourcing claims. Some grades are sold as 100% bio-based, others as part-bio-based. If certifications matter, check the supplier documentation.

Substitutes

• Coco-caprylate — close cousin ester, similar dry feel, slightly less silicone-like.
• Caprylic/capric triglyceride (fractionated coconut) — different feel, similar light role.
• Dimethicone — silicone original; gives a different, more “powdery” finish.
• Squalane — different molecule, similar light luxury feel.