K-Seal Radiator Leak Repair

K-Seal 8 fluid ounce bottle is effective to 20 quarts cooling capacity. Just shake, pour and go. It repairs leaks and cracks in radiator, head gasket, heater core, freeze plugs, water pump casing, cylinder heads and engine blocks.

http://www.intomars.com/kseal-st5501-multi-purpose-one-step-permanent-coolant-leak-repair.html