JB Weld 2120 RadiatorWeld

J-B Weld RadiatorWeld Radiator Repair Kit is a product designed for permanent or temporary repairs of radiators made from metal and other materials. RadiatorWeld repairs cracks of 4″ or less and holes up to 1/4″ diameter. Once cured, it is chemical resistant and withstands temperatures up to 250° F. This kit is not recommended for polyethylene or polypropylene repairs.