NeoCem raises €17M to scale its low-carbon cement binder toward 200,000 tonnes per year

NeoCem, a French startup founded in 2021 by Christophe Deboffe (President) and Benjamin Constant (CEO), has raised €17 million. The sole investor is Crédit Mutuel Impact, through its Fonds Révolution Environnementale et Solidaire. The capital goes toward scaling NeoCem's production facility in Saint-Maximin, Oise, toward 200,000 tonnes per year of NeoFlash output.

NeoFlash is a cement binder made from calcinated clay — fired clay — that replaces the clinker at the heart of conventional cement production. Clinker accounts for the vast majority of cement's carbon footprint: manufacturing it requires heating limestone to roughly 1,450°C, releasing CO₂ both from combustion and from the chemical decomposition of calcium carbonate. Calcinated-clay binders operate at significantly lower temperatures, and the clay feedstock does not carry the same decomposition emissions. NeoCem says NeoFlash reduces CO₂ by up to 90% versus standard clinker while matching conventional cement's technical performance — strength, setting time, durability — and requiring no change to the buyer's processing equipment. The product is designed as a drop-in replacement at the binder layer, not a reimagining of the construction supply chain.

Why cement decarbonisation has stalled

Cement is responsible for roughly 8% of global CO₂ emissions — more than aviation — and its carbon problem has a well-understood cause: the clinker-burning step produces CO₂ that cannot be captured through process efficiency alone. The industry has known this for decades. Progress has been slow not because the chemistry is disputed but because the economics of scale-up are brutal. New binder chemistries have to be demonstrated at tens of thousands of tonnes before they can be evaluated for price competitiveness against clinker, which is produced globally at billions of tonnes per year with decades of sunk capital behind it.

NeoCem's approach inserts calcinated clay at exactly the point — the binder — where most of cement's carbon liability sits. The clay feedstock is abundant and domestic; France has significant reserves of suitable raw materials. The company operates a production unit in Saint-Maximin (Oise) and maintains its headquarters in the Lille metropolitan area.

A different kind of investor

The Fonds Révolution Environnementale et Solidaire, managed by Crédit Mutuel Impact, is not a VC. It is a bank-backed impact fund with a longer time horizon than typical early-stage capital and a mandate aligned explicitly with environmental and social objectives. As the sole new investor in this round — with existing investors Rev3 Capital, Nord France Amorçage, Finorpa, and CB Green retaining their positions — the structure reflects a deliberate choice: patient capital, not growth-at-any-cost funding.

"Decarbonising cement is one of the major industrial challenges of our generation," Constant said. "Taking it on alongside a committed, long-term investor changes the game." Nadia Bouzigues, CEO of Crédit Mutuel Impact, said the fund saw in NeoCem "a low-carbon, competitive solution to advance one of the country's most emissions-intensive industries."

The company's prior round — approximately €23 million — funded the development of the chemistry and the Saint-Maximin facility's early capacity. This round is explicitly about scaling production, not about proving the chemistry again. Whether 200,000 tonnes per year is sufficient to demonstrate sustainable unit economics — and attract the industrial offtake agreements that would make the next phase of growth self-financing — is the specific question this capital is designed to answer.