Uni Foam Filter Oil is specifically designed for foam air filters. It resists drain-off and traps dirt particles and ice crystals, providing extreme filtration efficiency. Uni Foam Filter Oil allows maximum airflow while keeping the dirt and dust particles out. Safe to use on all OEM and performance air filters. Uni Filter products perform their best in the worst of conditions. That's why Uni has been the chosen air filter of all serious offroaders for decades. In this dirty, dusty environment, air filtration is extremely critical to the performance and protection of the engine.