Cacoon Carbon

Cocoon Carbon is a climate-tech company transforming industrial waste into sustainable building materials. Their technology upcycles steel slag—typically a byproduct of electric arc furnaces—into a low-carbon supplementary cementitious material (SCM) that can replace up to 30% of conventional cement with lower emissions and cost. Cocoon integrates modular systems into steel plants’ slag pits, recovers value from waste, and helps decarbonize both the steel and concrete sectors.