so i've had this stuff in my car for a while now. and as some of you might remember the ceiling was a disaster, the stuff straight melted. and now the stuff in my trunk is melting too... anyone else having these problems with raammat? anyone have any other suggestions as to what i should use instead that's affordable

i was thinking of adding a feel layers of glass to the outer door skin, would that work well as far as sound proofing? or is it not dense enough?