I am building an 8ft x 12ft Saltbox Shed. It needs to be air tight so I am assured no critters(including pill bugs, ants, snakes, skunks, mice, rats, etc) or heat or cold would invade the interior. If I want to use two rolling doors (rather than hinged doors) with dimensions of 30 inch wide and 6ft, 8 inch tall how do I seal the doors to keep it air tight. In other words; what kind of weatherstripping product is available to make the fit and finish of the doors air-tight?

Thanks