Foam Air Filter Cleaner Free of solvents which harm filter glues Biodegradable, non-combustible Ready to use, after cleaning wash with water, allow to dry Biodegradable and noncombustible cleaner for foam and fabric air filter elements Solvent-free Washes filters clean with warm soapy water Can be used in hand pump-type spray bottles Use before treating air filters with Air Filter Oil 206 or Air Filter Oil Spray Available in 1 liter bottles, 12 per case, and 4 liter bottles, 4 per case; sold each FOAM BIO AIR FILTER CLNR 1L