1965 Sound Deadener or Undercoating

Joined
Sep 14, 2022
Thunderbird Year
1965
Hi

New to the forum. Did some research here and on Mustang forums about this, didn't find a definitive answer.

My brother and I have a few classic cars, he has a Wimbledon White 1965 with "maroon" interior.

It was built at the Wixom, Michigan plant.

It seems to have factory undercoating / sound deadener underneath, wheel wells and engine compartment . Was this an option from the factory, standard assembly practice at the factory, a dealer installed option or only an aftermarket option?

The reason for the request, other than just knowing about it, is that this car has gone to a few Concours and we want to create signage for it that denotes the undercoating isn't Ziebart or other aftermarket additions.

The Mustang forums indicate that this sound deadener was sprayed on at the factory, at least in Mustangs, and the Concours restorers replace it when repairs are needed or a restoration occurs. Can't seem to find a definite answer.

Please let me know any thoughts you may have.

Thanks,
Mark
 
Joined
May 24, 2021
Thunderbird Year
1966
Hi

New to the forum. Did some research here and on Mustang forums about this, didn't find a definitive answer.

My brother and I have a few classic cars, he has a Wimbledon White 1965 with "maroon" interior.

It was built at the Wixom, Michigan plant.

It seems to have factory undercoating / sound deadener underneath, wheel wells and engine compartment . Was this an option from the factory, standard assembly practice at the factory, a dealer installed option or only an aftermarket option?

The reason for the request, other than just knowing about it, is that this car has gone to a few Concours and we want to create signage for it that denotes the undercoating isn't Ziebart or other aftermarket additions.

The Mustang forums indicate that this sound deadener was sprayed on at the factory, at least in Mustangs, and the Concours restorers replace it when repairs are needed or a restoration occurs. Can't seem to find a definite answer.

Please let me know any thoughts you may have.

Thanks,
Mark
In the 50's, when I was a kid, undercoating was a dealer option on any car when you lived in snow country. Undercoating was a way to prevent the salt on the roads from rusting the car. Undercoating was not about sound deadening.
 
Joined
Sep 14, 2022
Thunderbird Year
1965
Hi, thank you for the response.

The sound deadening label isn't as important as whether or not there was any possibility of a material sprayed on at the factory.

Someone who was a line worker at Ford told us he could tell by where the holes were that it was a factory application vs. a dealer or aftermarket.

Does anyone know if this is accurate?

Please let me know.

Mark
 
Joined
Aug 14, 2019
Thunderbird Year
1957
My '57 has undercoating. I'm going to assume it was done by the dealer as even the engine hood is undercoated. Don't know If I have seen another one like that. It has every option other than power seats So I assume the original owner commissioned it as cost was no object. I don't mind it, It almost looks like the insulating panels in the hoods of all cars now.
 

BigClay

Active Member
Joined
Jun 14, 2018
Thunderbird Year
1964
Hi

New to the forum. Did some research here and on Mustang forums about this, didn't find a definitive answer.

My brother and I have a few classic cars, he has a Wimbledon White 1965 with "maroon" interior.

It was built at the Wixom, Michigan plant.

It seems to have factory undercoating / sound deadener underneath, wheel wells and engine compartment . Was this an option from the factory, standard assembly practice at the factory, a dealer installed option or only an aftermarket option?

The reason for the request, other than just knowing about it, is that this car has gone to a few Concours and we want to create signage for it that denotes the undercoating isn't Ziebart or other aftermarket additions.

The Mustang forums indicate that this sound deadener was sprayed on at the factory, at least in Mustangs, and the Concours restorers replace it when repairs are needed or a restoration occurs. Can't seem to find a definite answer.

Please let me know any thoughts you may have.

Thanks,
Mark
My ‘64 had undercoating that was 1/2” thick in some areas. It took me weeks to get the dried-up cracked stuff off. Underneath the surfaces were pristine. (I didn’t put it back).
My car was also built in Michigan, and I assumed because of the uneven thicknesses that it was dealer installed. I did lightly coat the wheel wells.
 
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