Action Fluid Bio Spray is a high-grade, biodegradable foam air-filter oil. The product is suitable for all high-quality, dual layer, open pore, foam air-filters. It can be used after cleaning with Action Cleaner Bio Spray.Only use in a well-ventilated area, preferably in the open air. Wear protective gloves and safety glasses!Action Fluid Bio Spray is the No. 1 choice of Grand Prix teams worldwide!