Commercial Marine From the snarling waters of the North Atlantic to the rugged coastlines of the Pacific Northwest, Diamond Sea Glaze closures secure vessels and their occupants from all seas, and all weather. From Oil Rigs to fishing fleets, tug boats to commercial charters, DSG window, door and hatch closures provide strength without sacrificing style. We welcome you to review our portfolio of products for Commercial Marine applications, or to contact us to discuss your unique specifications and requirements for custom crafted closures.   Click on the product to see more.