Differenace between Polymeric Mastic sound deadening and Asphalt (peel and seal) type - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-12-2007, 08:47 AM
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Difference between Polymeric Mastic sound deadening and Asphalt (peel and seal) type

Do any of you wizards know what the difference would be between the polymeric mastic type sheeting available from McMasters and roofing suppliers, and the Peel and Seal roofing type stuff from Lowe's / Home Depot??

I'm trying to figure out which of them to use on the interior of doors and floors before the panels are put on.

I've ordered some of the Ceramic micro spheres from Wick's Aircraft supply and will put that in with Elastomeric roof coating and (hopefully) shoot it with my undercoating gun. I though I could add some of the sheeting on top of this coating for additional sound deadening. Does that make any sense?

Also, for anyone that is interested, I compiled a bit of information from this site, and other sources and put it into a file, if anyone would like it here it is.
Attached Files
File Type: doc interior info.doc (88.0 KB, 1810 views)

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Last edited by hotrodf1; 01-12-2007 at 01:22 PM. Reason: SPelling errrror.
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Old 01-12-2007, 11:47 AM
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Here's a website with a good comparison between the different types:


http://www.sounddeadenershowdown.com/
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Old 01-12-2007, 01:05 PM
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I did exactly what you are describing. I used the 8" wide rolls of Peel and Seal because it was easier to install inside door panels. In addition I sprayed both the backside of the Peel and Seal and the inside of the doors with 3M trim adhesive for added stick. I don't believe the Peel and Seal is asphalt, I think it might be butyl rubber. It's much too sticky to be asphalt.

Vince
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Old 01-12-2007, 01:21 PM
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Quote:
Originally Posted by 38Chevy3WCoupe
Here's a website with a good comparison between the different types:


http://www.sounddeadenershowdown.com/
I did look at this site earlier - but he talks mostly of the commercially available (think expensive) products and says that he steered clear of the roofing products for "obvious reasons" I believe he says.

I called a roofing supply place and they did not really know any product by the name polymeric mastic, and didn't have any "ice guard" watersheild stuff either. Guess I'll have to go to Lowe's or HDepot.

Which one of those would have the Peel and Seal by name? If that truly is butyl rubber, that would be the stuff to use. The guy on the sound deadner showndown said that the butyl stuff was way better than the asphalt (cheaper) types. Higher heat resistance, better stick, etc etc.

Thanks for any info guys . . .
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Old 01-13-2007, 11:18 PM
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Quote:
Originally Posted by 38Chevy3WCoupe
Here's a website with a good comparison between the different types:


http://www.sounddeadenershowdown.com/
Great link. Thank you!!
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Old 01-20-2007, 02:36 PM
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Quote:
Originally Posted by hotrodf1
Do any of you wizards know what the difference would be between the polymeric mastic type sheeting available from McMasters and roofing suppliers, and the Peel and Seal roofing type stuff from Lowe's / Home Depot??
I have both. You need heat (hair drier) and a roller to install either. I didn't use heat when I installed my P&S...big mistake. I have 100's of bubbles in it and they are very hard to get out. You are much better off not getting bubbles in it in the first place.
Quote:
DESCRIPTION
Peel & Seal is a patented laminate of reflective aluminum foil, rugged,
cross-linked polymer films, and a thick layer of rubberized asphalt. The
asphalt compound adheres to most surfaces and seals around most
punctures, forming a protective waterproof barrier. A high-quality release
paper is applied to shield the adhesive surface until Peel & Seal is installed.
http://www.mfmbp.com/pdf/Peel%20&%20...ech%20Info.pdf

I used about 70ft^2 of the P&S on my S10 (my buddy has the other 30ft^2 in his 68 chevy short bed and it handles the heat of his headers quite well) but I have only laid down a few ft^2 of the Polymeric Mastic. I do however think the Polymeric Mastic is the better product. Because it doesn't have the rigidness of the aluminum foil it is easier to get into complex curved areas without creases (using heat of course). It also sticks better to automotive paint (both stick with a vengeance to the NoiseKiller paint!)

Last edited by Triaged; 01-20-2007 at 02:42 PM.
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Old 01-26-2007, 01:58 PM
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I put in ice shield about 10 years ago. I am redoing my truck so it will have to come out...only to be replaced again with ...what else ice shield. The truck was never garaged so it took on all the elements. It worked great as far as I am concerned

Look at this thread also. There is some good info.
sound deadening???
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Old 01-26-2007, 03:19 PM
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Now that we know that P & S is indeed Asphalt based, I remember reading somewhere in all of this that the Asphalt type will emit a smell, I assume when exposed to Summer Heat-anyone experienced this?
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Old 01-26-2007, 03:49 PM
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I have had no problems with my P&S in my truck in the hot SoCal sun that are the fault of the P&S. Interior temps get around 140F in the summer (with tinted windows and a windshield shade). I could smell the stuff for maybe a week after installing it...but to me it smelled as much of adhesive as asphalt. The only places that I have had problems with it pealing off are because of poor instillation on my part. I left WAY too many bubbles in it. Because of the asphalt in it poking a hole in it to vent the bubble isn't exactly easy. You need more like a 1/2" gash...of which I have many...to get the air out. I have tried to peal off and redo some of the areas that I messed up...not going to happen.
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Old 01-26-2007, 11:08 PM
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Quote:
Originally Posted by 35WINDOW
Now that we know that P & S is indeed Asphalt based, I remember reading somewhere in all of this that the Asphalt type will emit a smell, I assume when exposed to Summer Heat-anyone experienced this?


MY black truck went through the So. Az. summer last year with the A/C on and all I could smell was the leather seat, I installed P&S on everything but the windows !!
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Old 02-11-2007, 02:30 PM
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I was worried about potential smell so I put duct tape over the seams. probably overkill but there has been zero smell ever and I live in georgia.
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Old 02-15-2007, 02:18 AM
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Funny, I've recorded temps of 180 degrees in my car and I live in Canada. The el cheapo home depot stuff designed for houses that fails the most basic tests done would no doubt never even survive to winter. Winter here is usually as low as -40 at least once per year and as my garage is not heated it would be subject to both extremes. I'm going to do MY project right and use that second skin audio's Dampener, just need to figure out how much I need to do my floor, roof, doors and behind the rear seat.
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