Windshield and Rear Window Installation Tips:Fit your new window rubber to your cab first, then install the window glass.Use a rubber friendly lubricant such as WD40 and the Windshield Stick tool (#38-0796-F) to ease installation and avoid damaging your new window rubber.Window rubber shrinks; your new window rubber may appear slightly larger than the original prior to installation.TINTED Window has a full light green tint to glass.Windshield and Glass Sealant is silicone and seals windshields, windows, sunroofs and more. Flows into leaks like water but dries and forms a flexible, tough, clear seal resistant to extreme temperatures, vibration, shock and most chemicals.