I know that several of you have installed this stuff. I'm curious as to how well it's holding up. Has anyone done the insides of their doors? How about the vertical parts of the bed? If so, has the mastic stayed in place through seasonal temperature and humidity changes? I can't help but wonder if it stays in place on vertical surfaces when it's 140+ degrees inside the vehicle on a hot summer day. How about when it's 10 below zero? /forums/images/graemlins/eek.gif