Marl, Germany – Evonik Industries AG has launched a new range of almost entirely sustainable liquid polybutadienes, certified by the International Sustainability & Carbon Certification (ISCC). The Polyvest eCO range is manufactured from "sustainably produced butadiene… which has been shown to reduce the use of fossil raw materials by up to 99.9%," said Evonik in a statement 22 June. According to its website, the fossil-based feedstock is replaced by alternative raw materials including bio-based agricultural sources, bio-waste driven materials and circular feedstock. The new grades, according to the German chemicals group, have "identical physiochemical properties" to the fossil-based products and can be used as a drop-in replacement. "The biggest advantage for our customers is that it is not necessary to adapt their existing formulations," said Dr Sara Liébana Viñas, head of technical marketing for reactive sealants. "There is almost no easier way for our customers to reduce CO2 emissions."