Visbella 150g Auto Vehicle Exhaust System Sealant, Non-Slumping Professional Repair Crack Adhesive Super Glue Sealer for Car Mufflers, Tailpipes, Catalytic Converters

This stuff saved our bacon. My wifes car developed a leak/split in her exhaust manifold. It would have cost around $1,000 to replace the manifold. I applied a few coats of this, allowing proper time to dry between applications and it sealed the leak up very well. Just be sure to not rush it, allow it more than enough time to set up.

The Visbella Auto Exhaust System Sealant is excellent for quick and reliable exhaust repairs! The non-slumping formula makes it easy to apply on cracks or joints, and it adheres firmly to metal surfaces without dripping. After curing, it forms a strong, heat-resistant seal that holds up well under high temperatures and vibration. I used it on a minor exhaust leak, and it worked perfectly — no smoke, no rattles, and a secure, lasting repair. Highly recommended for anyone needing a professional-grade sealant for their car exhaust system!

The Visbella Exhaust System Sealant works for quick patch jobs on mufflers or small pipe cracks. I used it to seal a minor exhaust leak near a joint, and it held up well for about a month of daily driving before needing touch-up. It’s a solid temporary repair option but not a full replacement for welding or part replacement. Build Quality & Design Comes in a 150g tube with a thick, gray paste that doesn’t slump. Easy to apply directly onto cleaned metal. Takes about 10–15 minutes to set and fully cures after running the car for heat exposure. Real Performance Test Tested on a mild steel exhaust with a 1-inch crack. After surface prep and application, the seal hardened well and stopped all noticeable noise and leaks. Withstood several heat cycles up to roughly 500°C without flaking. After a few weeks, some minor cracking appeared under vibration. Pros Easy to apply with no mixing required Withstands high exhaust temperatures Effective for sealing small holes or cracks Affordable and works as described Cons Temporary fix only; not a permanent bond Can crack with vibration or large gaps Requires clean, dry surface to adhere well Best For DIYers or car owners needing a quick fix for small exhaust leaks before proper repair. Not Ideal For Large holes, major rust damage, or long-term use without mechanical reinforcement. Tips for Buyers Clean and dry the area thoroughly before applying. Let it cure with engine heat for best results. Keep a spare tube for emergency roadside fixes.

I tried the Visbella Auto Vehicle Exhaust System Sealant for a small leak in my exhaust, and it does work — the seal held and stopped the leak after curing. The product seems durable and heat-resistant, which is exactly what I needed. That said, the application can be a bit tricky and messy. The paste is thick and can be hard to spread evenly, and it sticks to your hands and tools easily. You need to be careful to apply it precisely, or it can get everywhere. Overall, it’s effective for sealing exhaust leaks, but the application process could be improved. Works as advertised, just not the cleanest or easiest product to use.

We developed a small exhaust leak where the exhaust pipe from the catalytic splits in two before the mufflers. 17 year old Subaru, driven in Maine winters for the previous 11 years (not daily), so some rust and corrosion on the pipes to be expected. An attempt was made to weld it, but not enough intact metal to accomplish a proper seal. This product looked interesting, so I gave it a try, but quite a gap to fill, and we use the car on a regular basis and I could not allow more than overnight for it to dry, so the material slumped a bit, and the exhaust leak punched a small hole through the uncurled patch. Surprisingly the 70% that remained did harden up over the next day or two, and I decided to complete the patch with more of the same material, let dry for a number of hours, then took a heat gun to speed up the cure, and let it sit overnight. The patch is complete and holding well for the past couple of weeks. If I had to do this over again, I would probably use a mix of steel wool and sealant to create a less slumpy material, given the gap to fill was large.