Lucas Foam Filter Oil is a unique low solvent, medium viscosity formula designed to penetrate the filter media and trap dust, dirt and sand while improving air flow. Because it has a slight tackiness it stays in place throughout the service life. Its water proof formula helps block out moisture and water. Will not clog foam filters even in colder temperature applications. Its blue color ensures coverage across the entire filter area. We recommend using an over the counter cleaning agent to remove oil prior to reuse. Lucas Oil is presently working on introducing its own foam filter cleaning agent.