Shipping and Environmental Arctic Leadership Act or the SEAL Act This bill creates the Arctic Seaway Development Corporation to provide services related to safety and environmental protection and response in the Arctic region, including to (1) construct deep water port facilities in the Arctic necessary to manage and facilitate increased marine traffic; (2) maintain a relationship with east and west coast ports serving Arctic trade; (3) collect voluntary maritime shipping fees from vessels operating in the Arctic; and (4) establish strong ties among U.S. residents of the Arctic region, Arctic shippers, and the maritime insurance industry.