PJ1 5-20 Foam Air Filter Oil (Aerosol), 13 oz PJ1 Spray Foam Filter Treatment protects high performance engines from costly repairs by improving the performance of all types of foam filters With its NEW, SUPER TACKY formulation, sand, grit and other abrasive particles harmful to internal engine parts, are removed from intake air Red dyed spray indicates areas covered Aerosol spray for quick and easy application with little to no waste