Meta Signs Multi-Year Low-Carbon Cement Deal with Sublime Systems for Data Center Construction

Meta has signed a multi-year agreement with Sublime Systems to buy low-carbon cement for future data center construction. The deal gives Meta priority access to Sublime Cement, an electrochemical alternative to traditional Portland cement that runs on clean electricity instead of fossil-fueled kilns. Meta is also contracting for environmental attribute certificates tied to at least 180,000 tons of Sublime Cement production. For Sublime, the agreement provides the kind of forward demand needed to reach financial close on its first commercial plants. The company says it is studying co-location with existing U.S. cement plants, which could help replace aging domestic capacity. The deal follows a similar binding offtake agreement with Microsoft and is aligned with RMI's book and claim framework for cement and concrete. Cement accounts for a significant share of construction emissions, and data center buildout is growing fast. A guaranteed buyer like Meta does not solve all the scaling risks, but it gives a first-of-a-kind producer a clearer path to commercial production.