Leaky exhausts/mufflers can be fixed with jb weld epoxy, or if the hole is tiny enough, you can use jb weld to close it up entirely. However, to harness its full potential, you need a solid understanding of how to use it properly I tried jb weld on my wife's 93 corolla exhaust manifold, it lasted maybe 3 days before burning off
Patched Up An Exhaust Leak With JB Weld Exhaust Wrap (Saturn Ion) - YouTube
Replaced the manifold with a new one
Few years later this one cracked, welded it up & this is still holding.
Peter von panda 234k subscribers subscribe I've reviewed the 7 best jb weld for exhaust leak solutions of 2025, perfect for any muffler or tailpipe repair Learn how to fix an exhaust leak using jb weld Discover if jb weld is safe for exhaust pipe repairs and how to apply it for lasting results.
If your muffler is showing signs of wear, leaks, or damage, repairing it efficiently can save you time and money
