Carbon Reduction
Every tonne sidesteps the emissions of ordinary Portland cement and permanently locks captured CO2 into stable carbonate minerals — a net-negative balance.
CemO2 makes net-negative cement from industrial waste and captured carbon — a drop-in replacement that stores more CO2 than it emits.
The construction industry can't stop pouring concrete. So the only way forward is to use simple drop-in solutions.
CemO2 sits at the intersection of carbon removal, circular materials and construction — without asking the industry to choose between them.
Every tonne sidesteps the emissions of ordinary Portland cement and permanently locks captured CO2 into stable carbonate minerals — a net-negative balance.
We upcycle industrial waste streams into high-value cementitious material, diverting them from landfill and giving them a second life in concrete.
A genuine and cheap drop-in replacement. Standard mixes, standard equipment, full structural spec. No retooling, no reformulation, no disruption to how the industry already works.
Photosynthesis and mineral carbonation permanently convert gaseous CO2 into stable carbonate minerals. We've engineered that natural process into a scalable manufacturing line.
CO2 is sourced directly from industrial flue gas before it reaches the atmosphere.
We mimic how nature turns CO2 into rock over millennia, accelerated millions of times in a controlled process.
The result is a mineral powder that drops into any standard concrete mix as a partial cement replacement.
Every batch ships with an ISO 14044-compliant lifecycle assessment, independently audited and certified.
SubZement™ is a high-performance, carbon-storing Supplementary Cementitious Material (SCM) engineered to redefine the environmental impact of concrete.
Our proprietary accelerated mineralization process turns fresh CO2 from industrial processes into a stable, net-negative mineral powder — an SCM that not only reduces embodied carbon, but permanently and safely locks CO2 into the built environment.
We're moving from lab to ground. First commercial projects are underway. Be the first to see the case studies as they break.
CemO2 was founded by civil engineers and materials scientists who spent decades inside the cement and carbon mineralization worlds. We understand that the green premium has been the main unresolved challenge to cement decarbonization and we are here to solve it.
Our mission is simple: make the lowest-carbon cementitious material the easiest one to specify. When the responsible choice is also the cheaper drop-in choice, the whole industry moves.
Funding, milestones and first results are on the way. Subscribe to hear it from us first.
Talk to our team about integrating CemO2 into your next pour — or join the newsletter for project updates.