Customer Reviews

34
3.8 out of 5 stars
Permatex 80333 Muffler and Tailpipe Putty, 4 oz.
Size: 4 OunceChange
Price:$4.08 + Free shipping (Addon item)
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48 of 48 people found the following review helpful
on May 14, 2012
This product will work, but you need more direction than the instructions on the package or their website. I think most of the poor reviews come from people who followed the vague instructions on the package causing the product to fail.
The important property of this product is that it cures in 2 stages.

Stage 1, water dries from the putty.
Stage 2, the putty cures/hardens from high heat.

During stage 1 it is critical that the temperature is below 212. If the temperature rises above boiling, the product will swell and fall off the pipe. The package states to start the engine and let it idle. That will work to speed stage 1 but if it gets over 212, it will look like the exhaust is blowing the putty off of the pipe. If you notice it rising like cookies in the oven, shut the car off, take a tool and push the putty back in place.

Stage 1 is the complex stage. How long it takes will depend on the amount/depth of putty you use. If you can use starting the car to speed stage 1 will depend how hot the engine gets the exhaust pipe at the repair. If you are in front of the muffler, I would not use the engine. My best guess is wait 2 days. You could use a blow dryer or a trouble light to provide a safe heat. The putty will become hard during stage 1, but I don't know of an indicator that you have finished stage 1. The real test comes when applying the curing heat of stage 2. If it doesn't swell, you finished stage 1. If it does swell, just reshape it and wait longer to apply heat over 212. The putty will stick to itself, so if it swells and you want to add more of it to the repair, it will stick/join the existing putty.

Stage 2 is simple, if you have completely finished stage 1. All you need to do is drive and the heat from the exhaust will cure the putty to a tough waterproof seal. (If it swells and falls out, you didn't finish stage 1)
My only concern would be if the putty is not heated enough from driving, it would not cure. I do not have any input on this as my repair was close to the engine and over 1000 degrees while driving.

My repair has lasted 30 days and it seems very solid. I hope that you can experiment with this product and find a method that works. My repair was to a very solid header pipe that only had a hole due to a heat shield that was spot welded on and rusted out at the spot welds. The product is cheap and easy to work with, about the consistency of toothpaste. Until you pass stage 2, the putty is still water soluble. If you need to soften it, just add water.

I would recommend going to
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to make a correct choice on the product you need. You can also find additional instructions for the products.
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23 of 23 people found the following review helpful
on October 26, 2010
This product worked very well. I had a about a 1/4 inch wide, 1 inch long hole in a still solid exhaust pipe. I would not expect any product to permanently seal a hole that large without being somewhat supported, so I didn't try. After filling the hole with the putty, I put two hose clamps [band type] side by side over the hole area and tightened them down while the putty was still wet. I started the engine and let it idle for 20 minutes to cure and harden the putty [idle only, don't step on the throttle]. I drove off the next morning to work and it is still leak free over one year later. I'm very pleased.
Thanks,
Mike
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8 of 8 people found the following review helpful
on November 29, 2011
I had a hole(well, more of a cut/slice) in my exhaust. I put a large amount of the putty on it and you are supposed to start the engine(no high revs) so the heat from the exhaust will speed up the hardening of the putty. The problem is the putty would "melt" at first and just spit and sputter out of the hole and not seal up. After it heated up then it would harden. I had to apply several coats after each one dried from the exhaust so each time the hole would get smaller and smaller. I think this putty is best used with the exhaust wrap repair so that it will help it stay in place and not blow out from the exhaust pressure. 3 months later and it is still holding...
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6 of 6 people found the following review helpful
on November 11, 2011
The crack running down the length of my muffler was pretty big. The putty was thick enough to fill the crack like bondo without dripping out or sagging. I used it first, then applied muffler tape over it. I heated the putty with my heat gun before applying tape to make sure it set up some and wasnt soft like toothpaste. That was a good call. I wasnt sure if the exhaust pressure would blow the putty out before the putty could harden so the heat gun was my insurance. One package of putty (2 packs inside) was enough to do my entire muffler.
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6 of 7 people found the following review helpful
on September 12, 2010
Poor welding skills on thin pipe, and this product made for a functional repair of a badly rotted tail pipe.

Works great!
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3 of 4 people found the following review helpful
on January 9, 2013
I hit a construction workers hard hat at 70 mph about 2 years ago with my little saturn ion. Since its a Michigan car, the hard hat hit the rusty "elbow" of the exhaust pipe right in front of the CAT Converter and made a few small holes. After 2 years, the car was getting so loud that I started sounding like a broken Harley. Anyway, I finally tried this putty for $3 on amazon and bam!!! Shes purring like a kitten! The guy at Goodyear told me I had to replace the entire section for $500 so I'm more than happy with this product. I didn't start the car per directions cuz I didn't want to blow a hole in the putty. I let the car sit for 24-36 hours and then fired her up. Sounds new again! PS Go get yourselves some Rhino Wheel ramps for $40 at walmart and stop jacking up your vehicles! Well worth the $40!
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3 of 4 people found the following review helpful
on June 6, 2012
I used this on long tube headers on my Ford 460 to seal a spot where two pipes come together and it's holding well. On the package it says to apply it and let the car idle for 10 minutes to harden it, but I'd recommend letting it sit for a few hours before you idle the car to harden it up all the way. I tried to run it (idle only) soon after applying the putty, and it started to expand out because it was still very wet. I would definitely recommend this to anyone that needs to patch a small hole or seal between two pipes. You may even be able to patch a bigger hole if you use something else (like wire mesh) to reinforce it and hold the putty together while drying.
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3 of 4 people found the following review helpful
on July 25, 2011
My center muffler developed a leak where the exhaust pipe enters the muffler.
I tried patching it per the instructions, but the movement between the pipe and the muffler kept breaking the seal. This stuff would probably work great on a static area, but a section that has give to it probably needs something that has more flexibility when dry.
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1 of 1 people found the following review helpful
on May 2, 2014
Had a gasket leak in between the exhaust manifold and down pipe. I gooped it up and used a header wrap to cover it. its been a few days and it seems to have fixed it. It starts to dry within minutes so be sure to have everything cleaned and ready.
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1 of 1 people found the following review helpful
on November 29, 2013
Awesome add on item.....sure makes things move easier when it comes to final line-up and clamping.
I thought this stuff was a gimmick, but with all the heat and weather that the exhaust goes through, its still there!
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