Wallner Expac, Inc. Email Format

ManufacturingCalifornia, United States11-50 Employees

Wallner Expac, Inc. is a U.S.-based manufacturer focusing on light-gauge expanded metals used to back filtration media, and it is the largest producer in this niche worldwide. The company is 100% employee-owned and traces its origins to 1959, having grown from a tool-and-die shop into a modern operation with headquarters in Ontario, Southern California, and additional facilities in Georgia and Texas.

Its expanded metal products have been adopted as a more economical, lighter alternative to welded wire in pleated filters, contributing to the firm’s position as an industry leader in filtration. Wallner Expac has introduced notable innovations, including X-Mesh in 2014, which is protected by a U.S. patent, and MicroForm micromesh in 2019 for applications ranging from EMI shielding to microfiltration. The company serves a broad set of industries—Architecture, Solar, Battery Technologies, Construction, Arts & Crafts, Home Improvement, Automotive, and Filtration—producing its products in U.S.-based plants with a longstanding emphasis on quality and customer satisfaction.

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