If your talking about a cement tile roof,the leaking area occurs under the cement tiles.Theres no real fast easy solution for that.  If your talking about a fiberglass shingle roof you can do a easy repair to temporarly stop the leak for a short period of time. Go to Lowes,Home Depot,etc. and buy a bucket or can depending on the area of the of Elastimerit Roof Coating. Its like a roll on paint that dries to a rubber coating. Sweep the area that you want to repair real good before coating it. This will temporarly stop the leak.
                 Sean M.
                
 December 2007