sound deadening VS fiberglass body

[1987C4]

Shortly I will be replacing the carpet in my 1987 coupe and I wanted to use some left-over Fat Mat (same stuff as dynamat, etc.) on the floor, and other interior panels to provide some sound deadening. I am wondering if these type of products (including the spray on rubberized soundproofing/undercoating) was compatable with our fiberglass bodies? Anyone ever hear of any chemical interaction or other problems with sound deadening products and fiberglass? I don't want to use anything that will attack or weaken the body. Many thanks for any insights! Brad

[EatRice]

Brad...I have used sound deadner in many vettes. 105 sq ft of it in my C5...works very well. I have seen no hazards to fiberglass or heard of any hazards. I would not use any undercoating inside your car. More of a mess than it is worth.

[1987C4]

Thanks EatRice for the insights. I just wanted to check before applying this stuff as I have used it on metal bodied cars, but the Vette and it's fiberglass body are new to me. I appreciate your words of wisdom. Now to drag out the Fat Mat and start cutting!
Brad

[corvette-pilot]

I sure hope it's safe
Otherwise I'm in for a big suprise someday when the bottom falls out