There has been some discussion on here before about the effectiveness of Fluid Film for keeping grass from clumping under mower decks. Well, I have received some good feedback on this and now understand the discrepency in recommendations. Using Fluid Film in bulk will dramatically increase the effectiveness of the application. It is thicker in form and will last significantly longer as it saturates deeper into of the pores of the deck. Buying in bulk is also cheaper in the long run as well. I would personally love to see some more feedback on this application, especially with the use of the bulk product. The aerosol form is perfect for most applications, but apparently it is not nearly as effective for this one.