Ingredient dictionary

Sucrose Acetate Isobutyrate

Also listed as: SAIB

A sugar-derived film former, made from sucrose and two organic acids, that forms a thin, glossy layer on the surface of a product. It is on the label of 5 products in our library. Checked against our library November 6, 2026.

What Sucrose Acetate Isobutyrate does

Forms a smooth, glossy film
Helps nail polish color stay put
Helps hair sprays hold their shape
Helps control a formula's thickness

Sucrose acetate isobutyrate is a sugar ester. Chemists make it by reacting sucrose, the common table sweetener, with acetic and isobutyric acids. The result is a clear, hard resin that dissolves in many solvents but not in water.

Formulators use it because it forms a smooth, glossy film as the solvent evaporates. In nail polish it helps color stick and wear well. In hair sprays it helps hold styles. It dries to a firm finish rather than a soft or greasy feel, so it is not a moisturizer.

Good for

Suits nail polish, hair styling and makeup formulas that need a long-lasting, glossy finish.

Frequently asked questions

Is sucrose acetate isobutyrate safe for skin?

It is generally well tolerated, and it is mainly used in nail and hair products rather than skincare. If you notice a reaction to any ingredient, stop using the product and check with a doctor.

Is sucrose acetate isobutyrate vegan?

It is made from sucrose, which is a plant sugar, plus acids that are usually made synthetically. Because of this it is generally considered plant-derived. If you need certainty, check with the product's maker about sourcing.