MikeW Posted February 24, 2005 Share #13 Posted February 24, 2005 I used Xylene to clean up the remaining residue. I also tried Acetone but Xylene works much better. It's the main ingredient in those goo remover products but is much cheaper and you can buy it buy the quart or gallon at places like Home Depot or Lowes, etc. It is toxic so wear proper breathing protection. Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114022 Share on other sites More sharing options...
SuperDave Posted February 25, 2005 Author Share #14 Posted February 25, 2005 I used Xylene to clean up the remaining residue. I also tried Acetone but Xylene works much better. It's the main ingredient in those goo remover products but is much cheaper and you can buy it buy the quart or gallon at places like Home Depot or Lowes, etc. It is toxic so wear proper breathing protection.I got a xylene product and it worked very well. Only took moderate elbow grease and now all the remaining bits of tar are gone and the bare metal looks nice an clean. Well...at least the parts that aren't all rusted look nice and clean. Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114117 Share on other sites More sharing options...
AChev Posted February 28, 2005 Share #15 Posted February 28, 2005 I was thinking about using the dry ice technique, for I am having one hell of a time with the transmission tunnel. I did the floors, and they weren't too bad, the tunnel is worse for me. Although I had some thoughts and concerns with the day ice maybe somebody can help clear this up. Is it possible to damage the metal by exposing it to such cold temperatures, maybe even crack it? We have all seen objects such as tennis balls surrounded in dry ice, and then they shatter like glass. I just need some re-assurance Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114475 Share on other sites More sharing options...
CrashNBurn Posted March 1, 2005 Share #16 Posted March 1, 2005 I'm not a chemist, but I believe the shattering tennis balls of which you are thinking were dipped in liquid nitrogen. Thanks for the write-up by the way. I've been having some difficulty getting all that tar mat off the interior. Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114552 Share on other sites More sharing options...
EScanlon Posted March 1, 2005 Share #17 Posted March 1, 2005 There is a big difference in the temperatures involved. I don't have my Chem book handy, but LIQUID Nitrogen is (if memory serves) MUCH colder than SOLID Carbon Dioxide. That is because Carbon Dioxide (CO2) does not pass through a liquid state at normal pressures. You have to have an ungodly amount of pressure to keep C02 liquid. It sublimates from a solid to a gas while gaining thermal energy and taking it away from the metal it comes in contact with. Yes it hardens the metal but you'd have to strike it just right at the exact spot that the metal has begun to crystalize (and that takes time) for it to crack it. I'm not saying it can NOT happen, just that it takes very special conditions for the famous shatter the metal with a hammer strike experiment.Enrique Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114561 Share on other sites More sharing options...
Bambikiller240 Posted March 1, 2005 Share #18 Posted March 1, 2005 Yes, a Large difference in temps.A block of dry ice has a surface temperature of -109.3 degrees F (-78.5 degrees C)Nitrogen changes from a gas to a liquid at a temperature of -320 ºF Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114563 Share on other sites More sharing options...
Mr Camouflage Posted March 1, 2005 Share #19 Posted March 1, 2005 Petrol disolves the leftover tarmat pretty well. Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114581 Share on other sites More sharing options...
new_2_z Posted March 3, 2005 Share #20 Posted March 3, 2005 wow that would of saved me a 2 day process of hell Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114973 Share on other sites More sharing options...
AChev Posted March 3, 2005 Share #21 Posted March 3, 2005 Superdave, thanks for the write up. I took your advice and gave it a whirl on my hatch bed. It worked excellent! After doing the entire transmission tunnel and floor boards by hand, the dry ice was a gift from heaven.The clean up with the dry ice is minimal! If the dry ice technique is done when it is fairly chilly outside no water condenses on the ice. So therefore there is no clean up other than the pieces of tar paper that are removed, and they get as large as 6" x 12". Because the pieces of tar mat are removed so easily, there is barely any residue left behind, so the need for xylene and scrubbing will be minimalAlthough I did have one problem. I did not purchase enough dry ice. When I got to the dry ice place, about 20 min. from my house, it turns out I only had $5 so I could only get 3 lbs. It just barely covered it, but the sections that had more dry ice on them came up significantly easier. Even 3 lbs. was enough to make the job only take about 20 min. of labor after the dry ice sets in. Sorry I could not post my pictures yetAll in all, a perfect thumbs up. I recommend it to all who need to remove tar paper Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114979 Share on other sites More sharing options...
marximus Posted March 3, 2005 Share #22 Posted March 3, 2005 this is a stupid question i realize, but why remove the tar mat? i am restoring my 280z, and i was going to just leave mine alone since there is no rust. it doesnt look pretty, but it reduces noise compared to no tar mat and it is covered by carpet anywho, so why remove it? is there any reason besides to remove rust? thanks for putting up with my stupidity mark- Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114981 Share on other sites More sharing options...
MikeW Posted March 3, 2005 Share #23 Posted March 3, 2005 this is a stupid question i realize, but why remove the tar mat? i am restoring my 280z, and i was going to just leave mine alone since there is no rust. There is almost always rust under the tar mat. If you really don't have rust please post some pictures of your floor pans. Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-114987 Share on other sites More sharing options...
AChev Posted March 3, 2005 Share #24 Posted March 3, 2005 Under the majorty of the tar mats there was no rust, except for the floor boards. Transmission tunnel, and hatch bed were good!Many guys remove floormats if they are doing full restorations, they want to get rid of the old, gross, problemful mats. Eventually the mats will trap moisture and cause problems, so for a full resoration guys normally remove them so the entire car can be painted, then new sound deadening or thermal insulation can be installed Link to comment https://www.classiczcars.com/topic/15078-how-to-use-dry-ice-to-remove-tar-insulation/?page=2#findComment-115007 Share on other sites More sharing options...
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