Tire Noise Reduction -- Any Experiences with Fender Liner and/or Fenderwell Treatments?

petethepug said:

Engine bay & mat may be an issue. Will it get gooey from heat or find an ignition temp that makes it burn like a tire?

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No. The ResoNix Fiber Mat specs say: "Service Temperature (°F): -40 to +300 continuous; +375 intermittent"

Even if not that brand/item, I will only be using automotive-grade materials appropriate for the locations I'm applying them. I don't use stuff like tar tape for house gutters on a vehicle.

This sounds like something I would try in the past but having already passed my prime of WAY overdoing fatmat I'll warn you off. It melts and it flows! If the sun doesn't do it then your engine bay heat will and you will end up with that butyl tar-like crap everywhere. The inside of the doors of my Duramax and the back wall of the cab and the underside of my dash etc are all irrevocably stained and have all required a lot of clean up over the last 10 years. Oddly enough the fatmat I put on the roof seems to be relatively stable but anything that was installed "upright" has flowed into places I never wanted it.



Just imagine that entire back cab wall dripping down to the floor over the course of years and then remember its inside all the doors, inside the skin and outside, and under the dash, etc. I can imagine the butyl leaking and getting flung onto exhaust or other things will be smoky and on anything you work it will just be miserable.

gtrslngrchris said:

This sounds like something I would try in the past but having already passed my prime of WAY overdoing fatmat I'll warn you off. It melts and it flows! If the sun doesn't do it then your engine bay heat will and you will end up with that butyl tar-like crap everywhere.

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Thanks for the warning! FWIW, I used Dynamat Xtreme on the BMW I mentioned earlier in the thread, and on the exhaust/gas tank heat shield between the muffler and tank, or on the valance right above the muffler, it hasn't melted or flowed in over a dozen years. Those are both vertical surfaces, and at the closest, it comes within an inch of the exhaust.

Scrappycrow said:

Thanks for the warning! FWIW, I used Dynamat Xtreme on the BMW I mentioned earlier in the thread, and on the exhaust/gas tank heat shield between the muffler and tank, or on the valance right above the muffler, it hasn't melted or flowed in over a dozen years. Those are both vertical surfaces, and at the closest, it comes within an inch of the exhaust.

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I may have to give the extreme version a try but my guess is that it really comes down to how long it sits in the heat and since I'm in Oklahoma there are weeks straight where the outside temp never drops below 90 degrees. I should have also said that the thinner fatmat I've applied over the years has generally been stable but the thicker stuff is what bit me.

Oh my glob. The Fatmat story is scary stuff. Strange it stayed on the roof where the heat gets it and slithered on the sides.


I’d have more of a meltdown than the fatmat did

petethepug said:

I’d have more of a meltdown than the fatmat did

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You might think so until you go to clean it up