Hess Pumice Products, Inc.

Pumice is used for polishing and finishing, for lightweight insulating concrete, as an NCS paint filler, a soil conditioner, and a concrete pozzolan. And more. We produce over 300 spec grades of pumice for industry—from one-inch nuggets to the consistency of smoke—all made from pumice with a hardness and purity recognized as superior to any source worldwide. We know pumice: we’ll help you determine what you need. Located in Southeastern Idaho near the community of Malad City, Hess Pumice Products is a mining & processing operation specializing in the extraction and refining of the world’s purest commercial deposit of white pumice. In continual operation since 1958, we’re the largest producer of processed pumice on the planet. Why? Our “On Spec—On Time” promise and a dedication to the highest standards of refinement, grading, and quality control.