The material in question is already applied on some areas of the car floor from the factory.
Posting some pics for reference:


In the pics below the same material but just grey in color.



So if you are worrying about it clinging to the carpet....... well that thing is already there, we are only applying more of it :).
Also there is a layer of namda between the carpet and the floor (which would protect the carpet). If one wants to be super careful, a 2mm layer of jumbolon can be applied over the sheets. But i dont think clinging to the namda (not carpet) would be an issue.