Hello, I just did the windshield gasket on my demon recently. I used Metro's supersoft " ribbon sealer " part #MW38115 purchased from my local auto parts store. I went from half way up each side and along the entire bottom. You can also use a sealer that comes in a tube for a caulking gun, but it is more expensive. As for the gasket itself, I went through classic industries. The new gasket i received was NOT like the original. So, if your wanting an original looking replacement, make sure you call first to make sure. There was quite a bit of difference between the two. The new gasket had the lock strip going completely around the entire gasket and has some extra rubber " lip " that sits atop of the bottom chrome trim of the windshield ( which made installing the bottom trim a nightmare ).
