Neustark to certify carbon removals under Puro.earth’s Carbonated Materials methodology, with first credits expected in 2026.
The partnership expands Puro.earth’s supplier network to more than 300 verified carbon removal providers globally.
Neustark’s technology converts demolition concrete into a long-term carbon sink, locking in biogenic CO₂ with proven durability and traceability.
Practical scale-up of durable removals
Swiss carbon removal company neustark has joined the Puro.earth supplier network and will certify credits under the Carbonated Materials methodology of the Puro Standard. The arrangement enables neustark to issue CO₂ Removal Certificates, or CORCs, in the Puro Registry beginning in 2026. It brings a growing European deployment of mineralization sites into a verification system built for durability and traceability.
What the agreement covers
Certification through Puro.earth places neustark’s projects inside a ruleset that defines how carbon is counted, monitored, and credited when embedded into mineral waste streams. Under the Carbonated Materials methodology, a single CORC represents one tonne of verified CO₂ durably stored. The company’s credits will be listed and transactable in the Puro Registry once issuance begins, giving corporate buyers an auditable instrument to match against net-zero plans and hard-to-abate residuals.
Puro.earth, which now counts more than 300 carbon removal suppliers, has become a focal point for engineered removals that emphasize permanence and measurement. Adding neustark’s pipeline expands available supply in a category that industry buyers increasingly view as essential to credible decarbonization strategies.
How the technology works
Neustark captures biogenic CO₂, typically from sources such as biogas plants, and delivers it to concrete recycling facilities. There, the CO₂ reacts with calcium-rich demolition concrete and other mineral wastes, locking carbon into stable carbonates within the material. The result is a secondary aggregate that can be used in construction, while the captured CO₂ is stored for the long term inside the mineral matrix.
Because mineralization is a surface reaction that proceeds rapidly under controlled conditions, it lends itself to siting near existing waste streams and infrastructure. Neustark already operates multiple capture and storage locations across Europe and is preparing additional sites to meet expected demand for verified, durable removals.
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Stakeholder view
“Neustark is a leader in the product mineralization space, backed by rigorous measurement and reporting. Puro.earth is excited to support their certification journey for Carbonated Materials CORCs expected in 2026,” said Alvin Lee, Head of Supply at Puro.earth.
The emphasis on measurement is central. Buyers that report against science-based pathways are under pressure to disclose how much carbon is actually removed, how long it stays stored, and how monitoring will catch any deviations. Placing issuance inside a registry with standardized accounting and audit trails helps meet those expectations.
Why this matters for governance and finance
For policy makers and standard setters, the announcement aligns with a broader push to distinguish durable removals from short-lived offsets and to channel finance toward methods that deliver verifiable storage. For finance leaders, registry-based issuance clarifies contractual risk and simplifies procurement, retirement, and disclosure. Clear methodologies and registry records reduce reputational and accounting risk relative to opaque or heterogeneous carbon instruments.
Corporate demand is also shifting. Many companies are limiting the use of short-term biological offsets and seeking removals that match decarbonization timelines for cement, steel, and chemicals. Mineralization credits can slot into those portfolios, particularly where buyers want geographic proximity to operations and evidence of co-benefits in circular construction.
What executives and investors should watch
First, issuance cadence. The value of CORCs depends on predictable volumes and verification timelines as sites come online in 2026. Second, cost trajectories. Mineralization’s competitiveness will hinge on logistics, access to biogenic CO₂, and integration with demolition and recycling markets. Third, integrity frameworks. Alignment with emerging guidance on permanence, additionality, and monitoring will shape corporate eligibility in sustainability reports and climate transition plans.
The wider significance
If neustark scales its European network under the Puro Standard, concrete and mineral waste streams could shift from an emissions liability to a climate asset. For regions seeking credible pathways to permanent removals, registry-verified carbonated materials offer a route that ties climate outcomes to construction supply chains. As issuance begins, the market will gain another tested channel for durable CO₂ storage, with governance, finance, and climate integrity built into the product from the start.
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