It sees like the the water shield is missing behind most door panels from previous repairs. I have started using this it it works pretty nice. You can buy it rolls and then cut off has much as you need . It is the plastic that is on carpets used in new and used cars. When we painted the 72 we put it on the carpet in the back and in the front. It kept all the dust and dirt from digging into the carpet and made cleaning up a lot quicker. Only problem is it is extremely sticky and once stuck to itself almost impossible to pull apart.