yeah, the radiator in my 96 honda accord has sprung a leak. It happened after i decided to go off-roading a bit

. When I parked the car there were a few drops of coolant dripping out. The radiator had done this about 3 yrs ago when i first put it in (VERY cheap rad), it seemed to be leaking from the joint between the plastic end tank and the AL core. I think i through some stop leak in and it fixed the prob, but it seems i gave it a good jarring and its back to leaking. I was orig just going to sell the car the first time i put in the rad/stop leak, but now i'm going to keep it so i don't wanna put anything in it thats gonna cause more problems than it fixes.
Long story short: Anyone know of a good coolant stopleak that works? Or does anyone know of a better way to fix the problem?
thanks, karma is coming...