June 29, 2025

HJ3® Named Cleantech Open Semifinalist

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Carbon Fiber Steel Tank Repair

HJ3 Composite Technologies Nominated as a Semi-Finalist in the Cleantech Open Accelerator

Tucson, AZ – HJ3 Composite Technologies, LLC has made a significant mark by being named a semi-finalist in the annual Cleantech Open Accelerator. This prestigious recognition allows the company to advance to the Rocky Mountain regional finals set for October 2013.

With over ten years of experience, HJ3 has been a leader in the application of carbon fiber technology, having installed more than 3 million square feet of this advanced material across over 10,000 structures globally. Their innovative systems are not only incredibly strong—ten times stronger than steel—but also make use of a by-product from oil refining, once considered waste, now transformed into a valuable resource.

The impact of HJ3’s solutions is substantial. By using their carbon fiber technology, structures can last an additional 20 to 30 years, offering clients major cost savings of up to 90% compared to traditional replacement methods. This approach allows property owners to preserve and reinforce aging infrastructure instead of replacing it entirely, making the most of existing resources.

As infrastructure continues to deteriorate worldwide, with costs reaching $3.6 trillion in the U.S. alone, HJ3's technology offers a sustainable and economical solution. The company helps repair everything from industrial steel pipes and tanks to bridges, commercial buildings, and even residential basements, saving millions in repair costs while reducing environmental impact.

About the Cleantech Open

The Cleantech Open is the world's largest cleantech accelerator, dedicated to identifying, funding, and supporting entrepreneurs who are tackling key energy, environmental, and economic challenges. As a non-profit organization (501(c)(3)), it provides the tools, mentorship, and connections needed to help startups grow into successful global enterprises. Since its founding in 2006, the Cleantech Open has helped 727 startups bring their ideas to life, with alumni raising over $800 million in external capital and creating thousands of green jobs.

Supported by a global network of more than 1,500 volunteers and sponsors, the Cleantech Open brings together public and private sectors to build a cleaner, more prosperous future. Learn more at www.cleantechopen.org, or follow them on Twitter and Facebook for updates.

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