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Discussion Starter · #1 ·
I'll be installing new carpet and a trunk kit soon and I wanted to know if I should take the opportunity to put any kind of rust sealant (POR-15 or something else?) down while I have access to the floors. What are everyone's thoughts? I did get mass backing on the carpet and I believe that I have sound deadening I will be installing too. I'm not so worried about the sound/heat issue as making sure that I protect the metal while I have easy access.

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Depends on the condition. If the factory paint looks great then dont do anything. If there are rusty spots then sand it down and apply rust preventative and a top coat to that. I wouldn’t go overboard coating everything if there isn’t a reason to though. May as well do sound deadener while you have it all out. Doesn’t take that long to apply.
 

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1966 289 3-speed
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Definitely get the mass back carpet and underlayment. Its easier to install and fits nicer, and does offer some degree of insulation. As for sealant, I agree with Milligan, you don't really need it unless you have existing rust or exposed metal. Some people use sound deadener, but its gets expensive and quite honestly I think its overkill unless you are really concerned about noise and heat.
 

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Definitely get the mass back carpet and underlayment. Its easier to install and fits nicer, and does offer some degree of insulation. As for sealant, I agree with Milligan, you don't really need it unless you have existing rust or exposed metal. Some people use sound deadener, but its gets expensive and quite honestly I think its overkill unless you are really concerned about noise and heat.
My sound deadener is just that Peel and Seal type of stuff. I think I got enough to do two layers on the roof and a layer on the floor for around $40 or so. Dynamat would have cost $200+. I used the “real” stuff only once and I found that sure it worked a bit better but was totally not worth the price difference.
 

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Discussion Starter · #5 ·
Thanks for the replies. I have underlayment but I wasn't sure which pieces. I got it a while ago then had to put things on hold to prioritize family. I was able to find the packing slip and I should have all the pieces for both floors. I'll see how much I need to coat the floor once I get the old carpet up.
 

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1966 Mustang Coupe 302 T5
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I found Fatmat on ebay and that has worked really well so far. I wanted something without logos if possible. The huge roll has been nice to use with no fear of running out.
 
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