Calderys, a provider of refractory products and services for the casting industry, has become an independent company following its acquisition by U.S.-based Platinum Equity. Paris-based Calderys will encompass the full scope of the High Temperature Solutions business area formerly under Imerys. 
Calderys comprises a global network of experts and 36 industrial sites in 16 countries.

The private equity firm announced in December 2022 that it will acquire HarbisonWalker International (HWI) with the aim of combining Calderys and HWI into a global business with increased reach and scale.