dripping onthe out side of your house? If the roof is leaking there is aluminum roof sealer like what Steve stated. This stuff is made for mobil homes. If you are talking about run off thats a different story. Most mobil homes, especially older ones, have a j-channel that is supposed to be a rain gutter running along the roof edge. These are completely inefficient for the purpose they were intended. I know becouse I had the same problem with my mobil home. I countered this by removing the J-channel and replaced with vinyl rain gutter. The hard part was the removal of the j_channel. The instalation of the rain gutter was a breeze.