Definition & Meaning of "mineral spirit"

What is "mineral spirit"?

Mineral spirit is a type of liquid made from processed petroleum. It is used to dissolve or thin oil-based paints, varnishes, and stains, making them easier to apply or clean up. Mineral spirits are known for their strong ability to break down and remove grease, dirt, and leftover materials from surfaces. They are commonly used in painting and cleaning tasks, as well as for thinning paint and cleaning brushes and tools.