Foam Filter Oil 500mlSpecial oil for wetting foam air filters. Thanks to the outstanding adhesive properties of the liquid, sand and dust are reliably trapped in the filter, preventing greater wear on the engine. Increases engine service life. Water repellent effect. Does not resinify or foam. The blue color when the filter is wetted helps to ensure uniform application. Suitable for use on all 2 stroke and 4 stroke motorbikes with air or water cooled engines using foam