I found this material in the plant where I work. It is called SC41/Nitrile/PVC and it is used for sealing purposes. It has a self adhesive backing and is 7" square. The first pictures shows what can be done to that material to simulate cracks in the tarmac. The second picture is to show the approx. size of it. It’s a very soft material. I’ve try to paint it as you can see on the second picture. The paint seems to stick so maybe it could be used to simulate concrete pads also. The pictures are not very good, I will correct that in a near future. I will try to have all the informations about this material and see if its available for all of us. Stay tuned.

