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.

sound deadening like dynamat?

How do you get dynamat off the trunk lid? Think I'm too lazy to take the trunk off.

i used a hammer and a screw driver

How much weight does it really at up to? Is it worth the effort? Looks like a PITA

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.

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.

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

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.

ive heard that stuff is cold, thanks for the tip ;)

Too my knowledge and a quick Google search dry ice is -109.3f or colder. It will "burn" you. Sorta like instant frost bite.

dude I know, everyone on earth knows

No worries. You'd be surprised at the number of idiots that try to pick it up and chew it. Seen it.

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.

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.

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.

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.

What do you mean? Makes a great stool hardener. I have some in my bunghole right now.

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.

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.