Phone Magnifying Glass Menu


HTT Episode 2 -Lightweight Aggregates

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.


Also be sure to subscribe to our podcast on iTunes, Google Play and Spotify and more!

About HWI, A member of Calderys

HWI is the largest supplier of refractory products and services in the United States, with a history that spans more than 150 years. It is part of Calderys and is the brand for the Americas region of the Group. HWI counts 25 manufacturing sites and 20 distribution centers in the Americas, as well as the largest refractory industry research facility in North America. 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.

For more information, visit