MG Shield is a fireproof cover gas developed by TNSC to prevent oxidation and combustion of molten magnesium alloys. Compared to sulfur hexafluoride (SF₆), a conventional cover gas for molten magnesium alloys, MG Shield significantly reduces CO₂ emissions per cylinder by a factor of approximately 22,800. Tsukuba Diecasting has reduced its annual SF₆ consumption by 4,500 kg by replacing the conventional cover gas with MG Shield in FY2023, based on its production technology cultivated through years of magnesium production and technical cooperation from TNSC regarding MG Shield. This equates to reducing over 100,000 tons of CO₂ (22,800 in Global Warming Potential).

In addition to its domestic factories, Tsukuba Diecasting is aiming to convert its Vietnamese factories to use MG Shield, and TNSC is also cooperating in this effort by installing local gas supply facilities and establishing a gas supply system. With technologies related to MG Shield, TNSC will continue to promote initiatives to reduce CO₂ emissions in the magnesium industry and contribute to the realization of a sustainable society.