HTT Episode 2 -Lightweight Aggregates

Jun 29, 2020 / Podcast

Josh Sayre and Stephen Karns discuss the properties of lightweight aggregates, including HWI’s own GREENLITE® aggregate in this installment of High Temperature Times™. Tune in to learn how GREENLITE® aggregate offers great thermal insulation without sacrificing strength, and why that’s important for its many applications.

For more information about GREENLITE® 45L, GUNTECH 60, or any of the other products mentioned in the show, contact us at

Click here to read Stephen Karns’ article, The Future is Light, published in the June issue of Hydrocarbon Processing magazine.


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About HarbisonWalker International

With more than 150 years of industry leadership, HarbisonWalker International (HWI) is the largest supplier of refractory products and services in the United States. Headquartered in Pittsburgh, Pennsylvania, the company’s international network spans North America, Europe, and Asia, with 19 manufacturing plants, 30 global sourcing centers, and technology facilities in both the United States and China. Serving virtually every major industry that requires refractory solutions to enhance production and protect assets, HWI is consistently recognized for its talented experts, industry firsts, and intensely driven excellence.



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Tune in to learn about lightweight aggregates, including HWI's own GREENLITE aggregate.


Our brand new GUNTECH™ gun mixes have been designed for easy installation without compromising installed properties.