reining in the heat and noise

[dieseldawg142]

Originally Posted by HunterRotten

I used gtmat off eBay, way cheaper. Made sure it was the butyl version and not their asphalt based one.

and that's your problem right there with p-n-s, it's asphalt based, not butyl. and it's supposed to be used with a special primer. i use it at work, mostly for flashing curbs, upstands, etc...it is not designed to take the heat in your truck. stick a thermometer inside your door on a nice day, the temp will be waay past the VOC's limit in it, which is why it melts and falls off. if your in a colder climate (not Arizona or Calf) it can survive longer, which makes people think it will work everywhere. whatever brand you decide to go with, spend the extra $ and get a butyl based product
fatmat does make a butyl version, it's a tad thicker and a touch more expensive, it's what i used in my crew. it will help, but for noise you need insulation of some sort. you want a jute pad at the barest, all kinds of diff insulations for vehicles on the market, there is also mass loaded vinyl (this is what i used) and numerous types of sound deadening sprays