Has anybody tried using a product called Armaflex to insulate the inside of their car? It is used in the HVAC industry as pipe insulation. It can be bought in sheets from 1/4" to 1" thick. It is glued with contact cement. It is a closed cell rubber product.The price is low, especially compared to some of these other products like Dynamat or others. Just wondered if anyone could say it's good or bad for this use.