The European Commission has cleared the way for a merger between two U.S. aluminium panel makers – Novelis and Aleris – to go forward, provided one of the companies sells part of its European business.

After conducting an in-depth investigation into the merger, the Commission said Novelis could buy Aleris if the parties agree to sell part of the European business. Novelis is the world’s largest maker of aluminium body sheets, and Aleris makes the same product.