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Old 05-31-2012, 12:35 AM   #1
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Default what is the best way to remove sound deading floor plan

seen the dry ice way but just thought you guys might have some input. it heats up and is getting tar everywhere. gotta get rid if it.
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Old 05-31-2012, 12:44 AM   #2
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sound deadening like dynamat?
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Old 05-31-2012, 12:49 AM   #3
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How do you get dynamat off the trunk lid? Think I'm too lazy to take the trunk off.
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Old 05-31-2012, 12:54 AM   #4
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i used a hammer and a screw driver
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Old 05-31-2012, 05:08 PM   #5
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How much weight does it really at up to? Is it worth the effort? Looks like a PITA
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Old 05-31-2012, 05:16 PM   #6
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Dry ice works really well, bust it up the pieces, spread it out, and let it sit for 10 min. Then it will just pop right up in big chunks when tapped with a screwdriver. It's a lot cleaner and looks a lot better if you don't have any carpet in the car. Some cars have a ton of sound deadening and you can really lose some weight, but in a Miata it's really minimal. It's just couple pounds infront of each seat and in the trunk.
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Old 05-31-2012, 06:14 PM   #7
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thanks, I found a place with dry ice near me sounds like it is the way to go.

to answer someones question. I want to remove all the tar under the carpet. this is not for weight or aesthetics but because on track it starts to melt and gets tar all over my shoes and clothes and makes a mess.
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Old 05-31-2012, 07:55 PM   #8
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Dry ice like pdexta mentioned. Just be sure you don't accidentally lean on it for more than a few seconds and cause permanent scaring to your arm. Don't ask me how I know this
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Old 05-31-2012, 09:05 PM   #9
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Food coloring on dry ice unfortunately does not produce colored smoke.

Much fun with dry ice killed my hypothesis of science project in fourth grade.
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Old 05-31-2012, 11:46 PM   #10
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ive heard that stuff is cold, thanks for the tip
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Old 06-01-2012, 12:06 AM   #11
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Too my knowledge and a quick Google search dry ice is -109.3f or colder. It will "burn" you. Sorta like instant frost bite.
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Old 06-01-2012, 12:11 AM   #12
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dude I know, everyone on earth knows
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Old 06-01-2012, 12:39 AM   #13
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No worries. You'd be surprised at the number of idiots that try to pick it up and chew it. Seen it.
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Old 06-01-2012, 01:05 AM   #14
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Per internet suggestions, I tried dry ice in an E36 BMW with a ton of sound deadener. It worked, but it took a lot more than a simple "tap with a screwdriver." I tried to go as light as I could, but I ended up with little dents in the floorpan from each tap of the screwdriver/hammer.

I switched to a heat gun after the first small test of the dry ice method, and the heat gun worked much better. Was more time consuming since you couldn't work on something else while the dry ice did it's job, but it didn't take much heat for the stuff to just peel right up with a gentle screwdriver pry. Goo-gone afterwards to take care of the leftover adhesive and you got a perfect, bare floorpan. I'll definitely use the heat gun method in the future.

Of course that was on a BMW, so I make no guarantees that this method will work as well on a miata.
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Old 06-01-2012, 08:41 AM   #15
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I was too lazy to go buy dry ice. I used heat, putty scraper and mineral spirits to remove remaining residue. Worked well enough for me. Plus this method was easier for the stuff on the firewall.
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Old 06-01-2012, 08:58 AM   #16
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I never tried dry ice, but have used a heat gun with much success.

Also, I like to use old wood chisels to scrape coatings off. Different sizes makes it easy to cut out the coating in knooks and crannies. Sharper the better. In areas where you can't us a heat gun, soaking the undercoating in a solvent of your choice also seems to make it easier.
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Old 06-01-2012, 11:10 AM   #17
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what people try to chew dry ice? unbelievable

i might try the heat gun, why not. seems like it might make a mess but I will give it a shot.
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Old 06-01-2012, 11:21 AM   #18
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Quote:
Originally Posted by psreynol View Post
what people try to chew dry ice? unbelievable
What do you mean? Makes a great stool hardener. I have some in my bunghole right now.
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Old 06-01-2012, 11:58 AM   #19
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Seriously the dry ice works, I wouldn't mess with the potential mess of heating it up. I did it in my old civic and after a good ten min all I had to do was hit it with a mallet and it would all shatter and just pick up the pieces. I never had to deal with chiseling it away and I did the entire car. Most of the effort is waiting on the sheet to get cold.
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Old 06-01-2012, 01:48 PM   #20
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I find that different cars like different things. Ford sound deadener laughs at dry ice, but a little careful heat gun action makes it scrape right up. Honda sound deadener on the other hand, prefers cold and solvents followed by sanding the residue off with Scotchbrite and ~400 grit sandpaper. I've never tried to pull up Mazda sound deadener, but try a few different things before you relegate yourself to a year of fighting the wrong method.
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