HWI, formerly HarbisonWalker International, is a leading supplier of refractory products and services in North America, serving a wide range of industries including iron & steel, non-ferrous metals, glass, cement, and energy. In February 2023, HWI became a member of Calderys, a global leader in refractory solutions, after Calderys was acquired by Platinum Equity. This integration enhances HWI's global reach and technological capabilities, combining its strong North American presence and expertise with Calderys' international network and comprehensive product portfolio to deliver enhanced value to customers worldwide.
Serves as the primary operational headquarters for HWI's North American business, including administrative, sales, technical support, and R&D functions, now integrated within Calderys' global structure.
The facility includes modern office spaces and likely houses or is near key R&D and testing facilities for refractory materials. It has historically been the nerve center for HWI's extensive manufacturing and distribution network.
The work culture likely emphasizes innovation in material science, customer-centric problem solving, operational excellence, and a strong commitment to safety, values reinforced by its integration into Calderys.
This location is significant due to HWI's long history and established leadership in the North American refractory market. It represents a major center of refractory expertise and customer support for Calderys in the region.
As a member of Calderys, HWI is part of an extensive global network. Calderys supports customers worldwide with a comprehensive range of refractory solutions and services, including manufacturing, research and development, technical support, sales, and project management. This global footprint ensures proximity to customers in key industrial regions across the Americas, Europe, Asia-Pacific, and MEA, delivering consistent quality and expertise globally.
1301 Stoll Road
Moon Township
Pennsylvania
USA
Address: 425 East Ctrl Ave, South Shore, KY 41175
Key production facility for the Eastern and Midwestern US markets, supporting industries requiring high-performance refractory linings.
Address: 9850 E Center St, Windham, OH 44288
Supports the industrial heartland of the US with specialized refractory solutions, particularly for steel, cement, and petrochemical industries.
Address: 101 E. Ramshorn Drive, White Cloud, MI 49349
A specialized plant serving niche markets requiring high-purity silica refractory products across North America.
Address: Carretera a Laredo Km. 16.5, C.P. 66600 Apodaca, N.L., Mexico
Strategic location to support industrial growth in Mexico, particularly in the steel, cement, and non-ferrous metal sectors.
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As of April 2025, HarbisonWalker International' leadership includes:
HarbisonWalker International has been backed by several prominent investors over the years, including:
Following the acquisition of Calderys by Platinum Equity and Calderys' subsequent acquisition of HWI in early 2023, the executive team was consolidated. Michel Cornelissen was confirmed as President and CEO of the combined entity. Most changes occurred around the acquisition period, setting the leadership for the newly expanded group.
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Common email formats for Calderys, which now includes HWI, typically follow standard professional patterns. The most prevalent formats are likely firstname.lastname@calderys.com or firstinitiallastname@calderys.com.
firstname.lastname@calderys.com
Format
john.doe@calderys.com
Example
85%
Success rate
Calderys Website • February 16, 2023
Calderys announced the completion of its acquisition of HWI, a leading refractory manufacturer in the U.S. This strategic move combines HWI's strong North American presence with Calderys' global network, enhancing their offerings to customers worldwide....more
Platinum Equity News • January 31, 2023
Platinum Equity announced it has completed the acquisition of Calderys from Imerys. Calderys is a global provider of specialized refractory solutions for high-temperature industrial applications....more
Imerys Press Release • July 28, 2022
Imerys entered into exclusive negotiations to sell its High Temperature Solutions business (Calderys) to Platinum Equity. This divestment was part of Imerys' strategy to focus on specialty minerals....more
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