Process

• The process of repairing a radiator with epoxy is called "cold welding," because the same goal of traditional welding is reached, but without heat. The surface must be sanded and cleaned before applying the epoxy.
  
  

Types

• Commercial epoxies accomplish the same goal, which is to glue pieces together or fill a break or crack. Some epoxies come in a dough-like form, while others have two portions that have to be mixed just before applying.
  
  

Function

• Epoxy can be used to fill punctures on the surface of a radiator; to "weld" the pieces of a broken hose connector or to fill the gap in an open seam or other crack.