Bed liner is supposed to be made in such a way that it will flex with the bed of your truck and not crack. If you go to the website I gave you a link to and call them they will give you all the info you can need and then some. I was going to reroof my 5th wheel without removing the rubber roof and they were quick to tell me that's not going to work. I think they are honest about it's capabilities. They pretty much said if you are putting it on a wood roof you wouldn't be able to remove it with a jackhammer.