Heat/sound deadner install
I am a powder and ceramic coater and have had great results with first putting a coat of ceramic barrier down which acts a primer and also will keep it 25 - 30 degrees cooler and also 10 - 12 db. sound deadening. Then put stick down insulation down. The stuff is brushed or sprayed on, no backing, and does work great. There are several manufactures such as Lizard Skin.