RADIATOR STOP LEAK, is a viscous brown liquid. It contains selected ingredients that block small leaks in radiators as well as condition the radiator water. Does not contain any harsh chemicals that may damage soft metals, nor will the product cause blockage of the cooling system.
RADIATOR STOP LEAK is used for the temporary and immediate sealing of radiator leaks. Add one bottle directly to the radiator water and run engine for 5 minutes. An additional bottle may be required on truck and other larger radiators If leak persists, the radiator may need more extensive repair.