EnviroCure-Felt Technology Receives U.S. Patent
United Felts’ EnviroCure-Felt liner technology now has a U.S. patent that recognizes the innovative styrene encapsulation technology for low-emission pipe relining.
US Patent No. 12,467,573 recognizes a cured-in-place pipe (CIPP) liner technology with an integrated barrier film that encapsulates styrene in resin, resulting in lower emissions and odor while maintaining liner strength and integrity.
“EnviroCure-Felt meets a growing demand for sustainable, low-emissions rehab solutions in the trenchless industry, without compromising on long-term durability,” says Mike Vellano, president and CEO of Vortex Companies, the parent company of United Felts. “This patent underscores the truly unique nature of this invention and reflects the decades of expertise United Felts has applied in addressing evolving regulatory and safety challenges.”
Now patented, this proprietary CIPP liner features a styrene-impermeable polymer barrier that significantly reduces styrene emissions to less than 1 ppm, well below industry standards. EnviroCure-Felt matches the proven reliability and structural integrity of traditional CIPP liners with enhanced environmental performance.
It offers a practical alternative to fully styrene-free options, which are often less durable and more costly. The liner is suitable for a wide range of applications, from municipal sewer rehabilitation to industrial pipeline restoration, including storm drainage infrastructure and culverts.
Matt Timberlake, president of United Felts, emphasized the technology’s installation process as a major advantage. “EnviroCure-Felt is engineered to install just like traditional CIPP liners, using the same equipment and methods crews already know,” Timberlake explains. “It allows contractors and engineers to adopt a more sustainable solution without changing their workflow—advancing infrastructure longevity, community health, and worker safety in a meaningful way.”
United Felts remains at the forefront of CIPP technology, driven by its commitment to quality, innovation, and sustainability under the “UNITED TO DELIVER BIG” ethos. Since its launch last year, EnviroCure-Felt has been widely adopted by major utilities and proven in the field as the benchmark for felt liners meeting styrene emission standards.
“United is dedicated to addressing today’s pipeline rehabilitation challenges with Cost effective, reliable solutions and will continue investing in technologies that advance industry needs,” says Vellano.
