Strontium stearate is a metal-organic compound, a salt of strontium and stearic acid with the chemical formula Sr(C₁₈H₃₅O₂)₂. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

A reaction of strontium hydroxide with stearic acid.

The compound forms white powder. Insoluble in alcohol, soluble (forms gel) in aliphatic and aromatic hydrocarbons.

Strontium stearate is used in grease and wax compounding.

It is also used as a lubricant to improve the flow characteristics of polyolefin resins.