Pete, I was looking throught the thread for the 3rd/4th time because I didnt fully grasp the seal around the viewing window. Once I slowed down, I think I figured it out. The viewing window sits in a frame. Along the front/sies of that frame you have attached with staples/Dow795 several pieces of hard rubber to act as spacers/cushions. The window is sealed along the front and sides with Dow795 and the back edges will be covered with liquid rubber coated wood with the liquid rubber overlapping onto the viewing window. I also recall you stating that the Dow795 sticks well to wood and actually bonds with rubber but I dont recall you saying how it bonds to the acrylic? Does Dow795 bond well to acrylics unlike other silicones?