Would there be any problem with tar stains or tire marks from a lawn mower moving it in and out of the shed with a light color verses car tires driving over it ? The rubber floor covering would be used only in an outdoor shed .

There is potential for tar and tires to stain our Diamond Nitro Rolls. What we recommend is placing the tire on a small area to see if there is a reaction. This may take some time, so leave it overnight. If there is not reaction over that time, then the tires will more than likely not stain the roll. Tar can stain the rolls, but it can be cleaned with Purple Power. You can purchase this at any local department store.