Ingredient dictionary

Calcium Sodium Borosilicate

A fine powder ground from a borosilicate glass, a mineral-based material. It adds light-reflecting shine and a smooth feel. It is on the label of 7 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Calcium Sodium Borosilicate does

Adds soft, light-reflecting shine
Helps pigments spread evenly
Adds body and texture to formulas

Calcium Sodium Borosilicate is a synthetic material. It starts as a borosilicate glass, which is made by melting silica and boron oxide with sodium and calcium compounds. The glass is then cooled and ground into a very fine powder. Because it is hard and stable, it suits cosmetics well.

Formulators use it for its light-scattering effect. Tiny glassy particles bounce light in many directions, which can soften the look of uneven texture and give a gentle glow. In mascara and eyeliner it can add body and help the formula feel smooth. In eyeshadow and lip gloss it adds shine without a heavy feel. It usually spreads smoothly on the skin.

Good for

Good for people who like shimmer, gloss and a smooth finish in eye and lip makeup.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is Calcium Sodium Borosilicate safe for eyes?

It is widely used in eye makeup such as eyeshadow, eyeliner and mascara. It belongs to no flagged ingredient family. As with any new makeup, do a patch test first if you have sensitive eyes, and follow the product's directions.

Does Calcium Sodium Borosilicate make makeup look shiny?

Yes, that is one of its main roles. It reflects light, so eyeshadows, lip glosses and other shimmery products look brighter and more radiant. The effect is usually soft rather than harsh, which suits everyday looks.