Cougar Chemical's #1591 Diesel Soot Remover is a very effective panel cleaner and diesel smoke remover. It is an excellent product for removing heavy soot accumulation found on trailers not washed regularly, railroad engines and boxcars. It is, also, an excellent vent-a-hood degreaser, driveway pad pre-soak and panel cleaner in drive-thru truck wash systems. #1591 Diesel Soot Remover makes light work of cutting through soot and carbon buildup turning a long job into a short one.