Windalco's parent company, Russian aluminium producer Rusal, increased aluminium exports by 49 per cent in June despite being placed under U.S. sanctions in April.
Rusal, the world's largest aluminium producer outside China, saw its exports and internal supply chain crippled after Washington put the company and its co-owner Oleg Deripaska on a blacklist in response to Russia's alleged meddling in U.S. elections.
Deripaska and his team are working to persuade the U.S. Treasury Department to lift the sanctions, which stipulate that U.S. customers must wind down business with Rusal by October 23.
Meanwhile, aluminium shipments continue, with Rusal smelters shipping 294,000 tonnes abroad in June.
The company's exports of aluminium in the period between January and June this year, at 1.27 million tonnes, were 9 per cent lower than during the same period the previous year.