VersaChem Muffler Weld
Your review: I used this as a last resort to fix a long crack 1/4 inch wide along a seam in my muffler. Followed the directions. The next day (20 hrs) started it up and quiet as a mouse. Its still early but working like a charm. Just follow the directions and wait like it says don't jump right in thinking the heat from the muffler will dry it. Let it cure.
Pros: Easy to put on. I used surgical gloves and used my fingers to push it into the cracks and smooth it out.
Cons: A small plastic putty knife added would be nice. Other then that no cons.