Ingredient dictionary

Zinc Stearate

Zinc Stearate is the zinc salt of stearic acid, a fatty acid. It works mainly as a binder, slip agent, and anti-caking ingredient in powders. It is on the label of 5 products in our library. Checked against our library November 6, 2026.

What Zinc Stearate does

Binds loose powder particles together
Adds a smooth, silky glide
Helps prevent clumping and caking

Zinc Stearate is made by reacting stearic acid with a zinc compound. Stearic acid is a fatty acid that is usually taken from plant or animal fats. The result is a fine, white powder that does not dissolve in water, and it feels soft and slightly slippery between the fingers.

Formulators use it as a binder, which helps loose powder particles cling together so pressed shadows and brow powders hold their shape in the compact. It also gives a silky glide, so powder spreads easily over skin and hair. Its slip can help pigment settle onto brow hairs more evenly.

Good for

Suits pressed powders and brow products, where a smooth glide and firm texture matter.

Frequently asked questions

Is Zinc Stearate safe to use?

Zinc Stearate is generally well tolerated and is widely used in powder and brow formulas. Reactions are uncommon. If your skin is very sensitive, test a small patch first, as you would with any new cosmetic.

Is Zinc Stearate the same as zinc oxide?

No. Zinc oxide is a mineral used as a sunscreen filter and skin protectant. Zinc Stearate is a zinc salt of a fatty acid, used mainly for texture and binding. Both contain zinc, but they do different jobs in a formula.