I'm in the process of fixing the windows in our MH, Bounder. They have a rubber seal but I was as careful as I could be not to destroy it. I did put a few tears in them but I'm pretty sure they'll be okay. Once installed the outside is clamped pretty tight against the side of the MH. The top edge also has silicone sealer. I searched online and couldn't find seal like the ones on our windows.