FOAM FILTER OIL IS FOR ALL STREET, OFF-ROAD, AND RACING FOAM AIR FILTER APPLICATIONS. INNOVATIVE BEL-RAY TECHNOLOGY HAS PRODUCED A FOAM FILTER OIL UNLIKE ANY OTHER. IT IS EASY TO APPLY AND IMPROVES AIRFLOW. ULTRA-VISCOUS FORMULA FORMS AN OIL BARRIER TO TRAP MICRON-SIZED PARTICLES THAT CAN CAUSE ENGINE DAMAGE. WATERPROOF FORMULA PREVENTS CLOGGING WHEN WET.