FLOOD 00410 QT PENETROL|Flood's Penetrol can be added to oil/alkyd paints, base primers, varnishes and stains to improve penetration and flow and eliminate unsightly brush marks. Unlike some additives that only thin paint, Penetrol improves the paint’s performance and also inhibits rust on painted steel surfaces. It mixes with oil/alkyd base paints and enamels, varnish, and asphalt. It is not compatible with two-part chemical-resistant coatings, latex or other water-thinnable paints, chlorinated rubber or coal tar coatings. It helps to always mix a small amount of Penetrol and the paint you plan to use to determine compatibility. Penetrol complies with US EPA National AIM VOC Rule.