1.) Is this stuff similiar to what I have seen on steel skeletal framework in large buildings/skyscrapers and the like? 2. By it changing sound energy to heat, seems as thou in summer, it might be counter-productive? 3.) Since u have experience w/ this type of material and the Dynamat/Fatmat which wud u say gives the best results, for time, money and energy invested?
I have not seen skeletal framework skyscraper but perhaps Maybe it's one of those "too much information" kinda things... energy cannot be destroyed (or created!) only converted.. (cool Einstein stuff) so the "absorbing" of sound has a consequence of coverting the audible vibrations (to heat) so... ha ha (I just thought of this) 'don't sweat it!' It is no measurable amount of heat! I live next to an airport so I could heat my house with sound insulation??? I wish..lol. The "2lb" per square foot sheet sound barrier for construction is good..and cheapest but a pain to glue in, and it MUST be in firm total contact with the sheet metal no air voids and to neutralize the resonance of the sheet metal, to work good. This can take 20-30 hrs for two layers. I chose the Noxudol 3101 because 1. Less time consuming than cutting all the intricate pieces to contour an area 2. I wanted to do areas not possible with the sheet vinyl. (behind sail panels, inside of doors, wheel wells) 3. An idiot (my helper) with a brush can do it.. 4. I wanted to spray it but the splashback overspray was CRAZY.. took much longer to brush. Still much less time. 5. It is very imortant to fill every small area where sound might transmit through..Small gaps will lower results significantly. Easier to fill gaps with a brushable product. 6. Cheaper than the "mats"!!!! 7. I hate Chip Fooses haircut, and he puts bondo on bare steel...oh the horror. I used two (2) five gallon pails of this muck! I guarantee that Dyno Mat is buying their dense vinyl from some industrial place then puts sticky stuff on one side then fancy label..that also sells it to other commercial industries. They do put a mylar "foil" on it.. but the mylar is to "reflect" sound back to its source..and is to be the FIRST thing the sound encounters.. so it would be better UNDER the car !!! not aiming the wrong way.. Just decoration u will never see under the carpet.and on the wrong side of the absorbing "mat". Better than nothing but TRY to find some technical details about its properties... you will not. All hype and Foosey bull. try google- ing anechoic chamber
Thanks for the explanation on Noxodul. It brought to mind something I saw today on Trucks, television show; they sprayed Lizard skin insulation on the bottom of the Mazda pickup truck. It is sold in 2gal containers abt 150 bucks and meant to be sprayed, "$80 for spray kit" also, needs a topcoat. Covers 100sf @ 20mil.
