BIO4COAT aims to validate at TRL 5 the use of 3 biobased building blocks (1,4-bioBDO, lcDCA, and biomethane) from Novamont’s biorefinery for producing safe and sustainable biobased coating solutions. Two value chains are planned: (1) Novamont will supply first-of-their kind polyester-polyols from 1,4-bioBDO and lcDCA for conversion into polyurethanes by FUNDITEC, to be used to create 1K PUD and 2K PUR in 7 prototypes under the guidance of ICAP-SIRA; (2) Aarhus University will purify biomethane for use by CEMECON in creating DLC coatings via CVD for high-temperature plastic processing tools, validated by LOGOPLASTE. Performance will be tested in terms of surface protection, printability, and controlled release under demanding conditions, with added recyclability, compostability, and no bioaccumulation, across 8 sectors (plastics, hygiene, textiles, agriculture, horticulture, furniture, energy, and construction). CERTH will implement a comprehensive SSbD methodology, guiding the development of biobased coatings with reduce (-20%) GHG emissions, allowing multiple EoL scenarios, and minimizing bioaccumulation risks. Upscaling insights(aligned with the CBE-JU TERRIFIC project), feasibility analyses, and business models will be supported by the University of Padua. KNEIA’s dissemination, exploitation, and communication efforts will maximize the visibility and impact of project outcomes. The analysis and engagement of stakeholder and the clustering activities will be performed at 2 levels: along the overall value chain by KNEIA, and with a focus on technical actors by EUBP which will establish 2 technical working groups with other EU-funded projects. Key impacts are expected in long-term progress in bio-based materials science and engineering, cost savings for industries by 30%, increased biodiversity and environmental health due to reduced pollution and sustainable resource use, expansion of the market for bio-based coatings, and enhanced competitiveness of EU SMEs