C-84 Frank's Special Cleaner- is a concentrated, heavy duty, multipurpose cleaner that cuts through grease, oil, road film, Hawaiian red dirt, volcanic ash, RV black streaks, bug residue, crayon marks and more. C-84 is great for degreasing, spot cleaning, hard surface cleaning and high pressure cleaning. Its non-caustic, biodegradable formula quickly and safely degreases engines, wheels, tires, door jambs and fuel doors. Spot cleans carpets, mats, fabric upholstery, vinyl and convertible tops. Frank's Special Cleaner cleans concrete floors, tile, grout and other hard surfaces. Its moderate sudsing, non-caustic formula will not harm aluminum or pressure washer components. Can be diluted up to 20 to 1 with water.