ok,

I do my anual rust proofing at Krown Rust control. (it's basically a thin oil sprayed everywhere on the inside panels of the car)

I want to use some sound deadening material in my car to improve road noise and improve sound quality.

Will this go well with sound deadning material. Since it's basically tar, will the oil brake it down and cause a big mess???

 

I din't think the oil will brek down the tar, but you do have to clean everything off the metal of the car before the sound deadening will stick. Also you can use the aluminum backed deadingin materail.