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Diamond Sea-Glaze Manufacturing Ltd. (DSG) has been a custom manufacturer of windows, doors, hatches and custom glass for over 30 years. Our product innovations have focused on the marine and heavy equipment industries, with custom applications driven by our customer's unique needs. Our core business is to design and manufacture closures. Our primary focus is to service our customers' needs with sound technical support and a high quality product. Since our inception in the 1970's, then called Diamond Glass and Aluminum Products, DSG has been expanding its product range and manufacturing capacity to meet customer demands in multiple industries. To facilitate our growth, in 1999 Diamond moved into a new, purpose built production facility. Since then we have incorporated our own powder and wet paint facility (2003), our own machine shop (2003) as well as our own flat glass tempering line (2004).