German electrical insulation specialist SynFlex has sold its subsidiary IsoTek GmbH, based in Möckmühl, to delfortgroup AG, the Austrian speciality paper manufacturer, as part of a strategic refocusing on its core electrical insulation and winding products business.
SynFlex described the divestiture as part of its long-term corporate strategy, stating that by concentrating on its own core business it aims to deploy resources and expertise more effectively.
IsoTek GmbH has specialised for over 25 years in bespoke turnkey solutions for electrical insulation in transformer manufacturing, serving applications in power transformers, distribution transformers, and traction transformers for high-speed trains and locomotives.
The acquisition gives delfortgroup — already a century-old player in electrical insulation papers — a platform for product portfolio expansion and market development. delfort is currently investing in a new chipboard machine at its Tervakoski site in Finland, and IsoTek is intended to play a central role in strengthening both the product range and technical expertise in the electrical insulation segment.
delfortgroup is headquartered in Traun, Upper Austria, and employs over 3,300 people worldwide across manufacturing and processing facilities in Austria, Hungary, the Czech Republic, Finland, Vietnam, Germany, Malaysia, China, the USA, Bulgaria, and Mexico. The group reported turnover of approximately €1.2 billion in 2025. Beyond electrical insulation papers, delfort’s business spans functional speciality papers for food packaging, the tobacco industry, and pharmaceutical package inserts.
No financial terms were disclosed. SynFlex stated its expectation that the transition opens positive prospects for IsoTek and all parties involved.
