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Insulating cab with undercoating

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Old 08-28-2010, 06:14 PM
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Insulating cab with undercoating

My floorboards and inside firewall are very hot from the engine and exhaust. Even with my A/C putting out 50 degree air it gets hot inside. I am thinking about maybe spraying a can of undercoating on the outside firewall and underneath near the exhaust the insulate it a little better. Does this sound like a good idea or bad?
Old 08-28-2010, 06:27 PM
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Originally Posted by mikes451
My floorboards and inside firewall are very hot from the engine and exhaust. Even with my A/C putting out 50 degree air it gets hot inside. I am thinking about maybe spraying a can of undercoating on the outside firewall and underneath near the exhaust the insulate it a little better. Does this sound like a good idea or bad?
Spray on under coating is going to do little to stop the heat problem your having, you need to find an insulation that goes under the carpet that will block the heat.
Old 08-28-2010, 06:43 PM
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Originally Posted by myyota
Spray on under coating is going to do little to stop the heat problem your having, you need to find an insulation that goes under the carpet that will block the heat.
im with stupid^
Old 08-28-2010, 06:44 PM
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Old 08-30-2010, 09:12 AM
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Maybe my problem is that I don't have any carpeting in my truck. All I have is a vinyl type material covering the floorboards.
Old 08-30-2010, 09:16 AM
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undercoating is still not gonna block any heat. you'd be better off taping a piece of aluminum foil there. lol. which wouldn't be all that effective, but it would be better than that undercoating.

Last edited by xxxtreme22r; 08-30-2010 at 09:18 AM.
Old 08-30-2010, 09:50 AM
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http://www.cascadeaudio.com/car_noise_control/tg-1.htm

This stuff is great, in fact everything by CAE is great.
Old 09-04-2010, 07:28 AM
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go to e bay and type interior floor insulation thats where i ordered mine and its way cheaper than dynamat
Old 09-04-2010, 07:56 AM
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Home Depot or Lowes, the little rolls of "roofing repair". They are about 10"x20yard rolls. There's some threads on here about it...foil on the top, and adhesive on the bottom, molds to the floor bumps... great for heat/deadening...put 2 layers on... it's about $10/roll... then cover that w/ some jute pad, or just throw your mats back over it.
Old 09-04-2010, 08:21 AM
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I would assume that those rolls from HD or Lowes are asphalt based. Has anyone actually done this with this product??

I would think that they would stink, especially on hot days?

Any actual user feedback on this?
Old 09-04-2010, 08:55 AM
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try this..> from Home depot.
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Old 09-04-2010, 09:02 AM
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can you comment on the smell?

Love the suicide knob as well!! I use to have one but I lost it!
Old 09-04-2010, 09:44 AM
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Smell? well none. I used a bit of craft sticky spray, and the silver stuff is just foil n air. I love the suicide knob too.
Old 09-04-2010, 01:24 PM
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I've heard the home depot approach smells in the summer. I want to put some in the doors and rear quarters. Don't really want to try this until I know for sure how it reacts to 100+F heat.
Old 09-04-2010, 02:07 PM
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It did have an asphalt smell when I first applied it, for a few weeks, but it went away. It wasn't bad at all, and I live in FL. The material is more rubbery than asphalt/tar.

It looks like Teuf installed something else in his red pickup... foil w/ the air bubble in between? You could try doubling up the 2 different types on the floor, and use the roofing material in the doors. I installed the roof repair inside the rear fenders/tailgate on my 4runner, and it rides pretty quiet now. The floor has roofing repair, then Jute padding, then the HD vinyl "carpet" flooring.
Old 09-04-2010, 04:29 PM
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Yes mine was the tin foilish kind, no smell whatsoever. Ok I see the post about the roof material.
Old 09-04-2010, 04:53 PM
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i say go, pick up a roll of carpet under layment foam.. and lay some that stuff down.. its probally the cheapest stuff you will find..
Old 09-04-2010, 05:04 PM
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I had to readjust clutch pedal, after I put mine in. takes up a wee bit of room.
Old 09-04-2010, 05:23 PM
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i would of just shaved the padding down in that area...
Old 09-04-2010, 06:06 PM
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Well I put mine in for Noise, so that area was important. Heat not a problem


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