While JB Weld can be used as a temporary fix for a cracked exhaust manifold, it is not a permanent solution and should not be used as a long-term repair. JB Weld is a two-part epoxy that can be used to bond metal, ceramic, and plastic surfaces together. It is strong and can withstand high temperatures, making it a suitable choice for repairing exhaust manifolds. However, it is not designed to withstand the constant stress and vibration that an exhaust manifold is subjected to, and it will eventually fail.
If you are considering using JB Weld to repair a cracked exhaust manifold, be sure to follow the directions carefully and apply it correctly. The surface must be clean and dry before applying the epoxy, and you must allow it to cure completely before driving your vehicle. Even with the proper application, a JB Weld repair is not a permanent solution and should be considered a temporary fix until you can have the manifold replaced.
