sound deadener heat resistance

[chibahawk 10+ year member]

hop to it!! im looking to buy a deadener and I was going to use PnS but will buy this if all works well

 

[hzsogood 5,000+ posts]

idk if it will stick to a spray on... i think it will but im not sure

 

[Rudy 10+ year member]

These non-aluminum foil constrained asphaltic membranes are actually less suitable for use in automotive sound deadeneing than Peel & Seal. Products designed for water proofing or for use as roofing underlayments have even less temperature resistance than those designed to be exposed to the elements. The waterproofing membrane you are looking at is designed to be applied and burried. Roofing underlayments like Grace Ice and Water Guard are meant to be applied and covered with the permant roofing in LESS THAN 30 DAYS.

Whether you are looking at construction materials at Home Depot or FatMat, B-Quiet Extreme, R-Blox, eDead, none of them are going to tolerate heat above 180F. You can debate what the maximum heat a vehicle will ever see, but that isn't the final answer. ALL of these products are asphalt stabilized by either SBS or SBR rubber. Without the rubber, asphalt melts at a much lower temperature. When exposed to heat over time - could be just 140F or less - the rubber compounds deteriorate and the asphalt is then free to melt at its normal melting temperature. One of the common scenarios for asphalt mat failure is that they are fine for a year or two and then fail under the same conditions under which they were previously fine.

Asphalt is no where near as sticky as butyl. The most common failure scenario is that it falls off a day or two after you install it. The initial adhesion can be improved by heating the mat, but you can melt asphalt in a second or two with a heat gun. Heating the mat to improve initial adhesion will speed the deterioration of the rubber compound's failure.

Asphalt has a much smaller temperature range than butyl in which it is effective as a viscoelastic damper. It is too solid when cold and too liquid when hot.

Finally, the asphalt industry itself is trying to deal with problems and potential legislation because of the toxic gasses it emits. This may be OK on a roof or road where there is someplace for the gasses to go, but do you really want them in your vehicle with you.?

I am completely convinced that you will be better off, in every way, by using less butyl damping - if budget is critical - than more asphalt. Asphalt just isn't worth the gamble. Butyl is more expensive than asphalt. Having asphalt damping products on the market excerts downward pressure on all of the products in the sector. If there is less profit to be made selling butyl based mats, ask your self why companies like Second Skin and RAAMaudio have completely switched to butyl. Then ask yuself why companies that we all know don't care a rat's ass about there customers are the ones selling asphalt mats.