Soundproofing Road Noise

No crackle effects from dynamat or aluminum tape. It is solid as a rock when finished. You can mold it around about about anything. If the dynamat foil rips, just tape it over. There are a few different dynamat clones, some of them are rubber-ish, some are made of roofing tar type stuff. I used the rubber type stuff. Buy it as thick as you can afford in the biggest sheets you can get.