Soprema is leading the European Hibiscus project, a large-scale research and development program aimed at rethinking construction materials to reduce the sector's dependence on fossil fuels. Launched last September, this project brings together eleven European partners – laboratories, SMEs, and large corporations – around a common goal: to design high-performance, bio-based construction products, in line with the ambitions of the Green Deal and the European bioeconomy strategy. The stakes are high for a sector that accounts for a significant share of CO2 emissions and waste: replacing petroleum-based raw materials with alternatives derived from renewable resources, while guaranteeing sustainability, performance, and circularity. The consortium – which includes the CNRS, the CSTB, the Fraunhofer, the University of Liège and the Bioeconomy for Change network – is working on the development of five innovative bio-based products for building envelopes: two roof sealing solutions based on pine resins and recycled cooking oils, two thermal and acoustic insulation products derived from lignin and carbohydrates, and a joinery solution based on vegetable oils.