ProClean Tonneau Cover Cleaner by Tonno Pro. Don't use the wrong cleaner on your Tonno Pro vinyl when you can use ProClean Tonneau Cover Cleaner specially formulated for your tonneau cover by the engineers that built it. It effectively removes dirt while it conditions the vinyl with special moisturizers that permeate deep down into the cover to prevent drying and cracking. Finally, the cleaner leaves a layer that protects your cover from the harmful effects of UV rays, airborne pollutants, acid rain, and other contaminants. Leaves a lasting shine that will not cause the vinyl cover to deteriorate, fade, sag, or widen pores to collect unwanted dirt and grime.