Title: Re: [FWDLK] Cuttin' down on the noise
Hi ;
This is correct, the old hard undercoat did do just thet, rot under the covering by traping water thru cracks. However in the last 10 years or so, at least some Jap Mfg. have been using a non-hardening undercoat. and it works well. Can be messy if you put your hand in it, but it seems to heal itself and won't crack and hold water between the coating and the metal. Very sticky, looks the same and covers well.
Actually, no undercoat is needed if you don't drive in salt and only then if you don't spray the undercarrage down with water after the exposure. Most restored cars spend the winter in storage, so you only need undercoat for an authentic look.
Ray Jones
From: cpollock@xxxxxxxx
Reply-To: cpollock@xxxxxxxx
Date: Thu, 4 Sep 2003 09:48:53 -0400
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] Cuttin' down on the noise
Hello All,
Just wanted to give a quick reminder to everyone. Undercoating, especially the rubberized kind, is one of the big reasons that our beloved cars rotted to death. Keep this in mind before you spray. This stuff will trap moisture and you will begin the rotting process. Also, with any pad, same issues. Make sure that the materials will not trap condensation. Modern car makers can use all this stuff because the steel today is much stronger and of a better grade than the old stuff our cars are made of, so use caution, and make sure that the areas you are going to use all this stuff on are absolutely spotless.
Wouldn't you hate to re-rot all the things you just spent all the time and money replacing?
Just my pennies,
Charles.
From: Marty Stewart <moopar2ya2@xxxxxxxxx>
Date: 2003/09/03 Wed AM 10:35:48 EDT
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] Cuttin' down on the noise
I used that bubble wrap type stuff with the foil on both sides. That worked very well. I also used some of the tricks from the newer high end cars. They cover all access holes and openings in the body with a insulation material. It looks a little like the stuff that comes in chocalate boxes between the layers but its a type of plastic. Any opening that access the passenger compartment should be sealed as well as possible. Pads under the hood and trunk will also reduce resonance. I like to insulate the roof under the headliner if accessible. Spraying on the rubber undercoating material to the back side of the door skins as well as the fender liners and etc will all add up to a much quieter car.
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I used that bubble wrap type stuff with the foil on both sides. That worked very well. I also used some of the tricks from the newer high end cars. They cover all access holes and openings in the body with a insulation material. It looks a little like the stuff that comes in chocalate boxes between the layers but its a type of plastic. Any opening that access the passenger compartment should be sealed as well as possible. Pads under the hood and trunk will also reduce resonance. I like to insulate the roof under the headliner if accessible. Spraying on the rubber undercoating material to the back side of the door skins as well as the fender liners and etc will all add up to a much quieter car.
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