Green360 lands first commercial supply deal for low-carbon cement replacement with Holcim

Green360 Technologies (ASX:GT3) has signed its first binding commercial supply agreement with building materials giant Holcim for MKX-CC calcined clay, a low-carbon cement replacement. The deal covers up to 4,800 tonnes over 12 months for Holcim's Victorian concrete operations. This marks a shift from product development to commercial sales, with production already underway at Calix's Bacchus Marsh facility. The product is designed to replace fly ash and slag, two supplementary cementitious materials facing supply shortages as coal plants retire and steel decarbonizes. Holcim's endorsement signals real market validation. Green360 expects to update on additional commercial discussions and a scoping study for a dedicated calcination facility later in 2026. For those tracking low-carbon construction materials and industrial decarbonization, this is a concrete example of a new supply chain emerging to fill gaps left by the phase-out of fossil fuel byproducts.