A powerful foaming bus shop cleaner/degreaser. For use on buses and engines, using  the foamy trigger sprayer, spray and let the foam sit for just a minute. Rinse or wipe off. Can also be used on floors in a mop bucket system. Bus Shop #9 is compatible with Steam Jenny and pressure washer systems. Allow Bus Shop #9 time to sit on the surface to be cleaned and then rinse the surface.