JB Weld is the best. Most stores including Wal-Mart sell it. Be sure to prepare the surface before using the JB-weld. I use alcohol to clean the surface with. I then use some course grit sand paper to make the surface rough so the JB weld will bond better. Then clean the surface again with alcohol. I have repaired gas tanks, radiators and engine blocks with JB weld. I use the regular kind because the quick kind sets too fast and doesn't seem to bond as well.
