rhi magnesita nv on tuesday warned that thirdquarter profitability was weaker than expected as costs continue to increase the ftse 250 manufacturer of refractory products which had previously guided for 2021 earnings before interest taxes and amortization of 310 million euros 360 million said fullyear ebita could be between eur280 million and eur310 million depending on price and cost increases rhi magnesita reported higher sea freight and demurrage costs in addition to rising energy and consumable expenses moreover the company said there was continued use of air freight to ensure customer supply as freight reliability impacted production schedules and deliveries during the current period of supply chain disruption we are focused on delivering for our customers who recognize that pricing needs to be increased to account for the higher costs affecting refractory producers worldwide chief executive stefan borgas said shares at 0704 gmt were down 12 at 2920 pence