For Pros and DIYers, Klean-Strip is the leading brand of solvents, thinners, removers, and cleaners that are dependable for reliable results. Klean-Strip Paint Thinner effectively thins oil-based paint, stain and varnish. It can also be used to clean brushes and equipment immediately after use. Made with mineral spirits. Read entire label prior to use or storage. Keep out of reach of children. Not for sale in South Coast AQMD.