radioactive C14 atoms decreases in dead organisms, for example fossil raw materials, but remains almost identical in living organisms such as renewable raw materials [...] with an optical zero joint, there is a high-yield, unfilled PUR adhesive that can be processed from 100 °C. It offers a high initial strength and can be processed [...] goal of sustainability. A sustainable adhesive must therefore meet equally high standards in terms of process reliability, bond quality and cost-effectiveness
https://www.jowat.com/en-AU/newsroom-detail/green-bonding-processes/