Originally Posted by VARam1500

I did have some shrinkage over time. In the places where I trimmed around the vents and in the edge that tucks into the horizontal plastic crease in front of the passenger, it got smaller by up to 1/8". The thing I learned about it is that it didn't hold up well in the places where I used the heat gun. After reading the contact cement can, it says that heating it will weaken the bond. So, mine did let go in the corners of the "tray" on the passenger side. It was "marine vinyl". Maybe not the truly right material for the job, but better than what I had. If it ever warms up, I have some plans to rework part of it. This material had a pretty strong fabric backing. My guess is that if you can find very thin material that doesn't have much reinforcement it will work best. It hasn't discolored in the sun at all.