The Ziebart website lists a Ziebart undercoating and a sound deadener. They say the sound deadener is 4X as thick as the standard undercoating.
It sounds like the sound deadener is what you want to avoid. In a one section of the short video on undercoating, the product looks normal oil colored vs black.
It sounds like the sound deadener is what you want to avoid. In a one section of the short video on undercoating, the product looks normal oil colored vs black.