Signals Defense, LLC

Signals Defense delivers advanced RF and IR shielding solutions that ensure the protection of sensitive information across various secure environments. Signals Defense specializes in RF and IR shielding solutions for protecting sensitive environments. Founded in 1999 in Owings Mills, US, the company has remained focused on this niche without notable pivots. The firm has engaged in one major deal, with its most recent financial activity dated April 2, 2025.

Signals Defense specializes in RF (Radio Frequency) and IR (Infrared) shielding solutions designed to protect sensitive information and secure environments. The company’s core offerings include proprietary RF attenuating window films, such as the SD2500/SD2510 and SD1000/SD1010, which are engineered to meet stringent security standards, including those set by the U. S. Intelligence Community for facilities handling classified information.

Additionally, Signals Defense provides a range of products including RF shielding paints, caulks, wallpapers, and decorative films aimed at mitigating eavesdropping and protecting critical infrastructure. Their solutions are primarily targeted at government entities, defense contractors, healthcare facilities, and corporate organizations that require secure environments for handling classified data. Signals Defense has deployed its products in over 3000 locations globally, including North America, Europe, and Asia, highlighting its international client base that includes government intelligence agencies and Fortune 100 companies. Signals Defense generates revenue through direct sales of its RF and IR shielding products primarily to governmental and commercial clients.

The company operates on a B2B model, providing tailored solutions that often involve partnerships with contractors and security firms for installation and implementation. The transaction structure typically includes one-time purchases of products like their patented window films and other shielding materials. Each project may be priced according to specifications and the scale of the installation, with larger contracts often resulting in customized pricing agreements based on the specific needs of the client. The firm’s flagship products, particularly the optically clear RF window films, are designed to meet rigorous security requirements and form a significant part of its revenue generation strategy.

In April 2025, Lockmasters, Inc. , a portfolio company of Dominus Capital, acquired Signals Defense. This acquisition is expected to expand Lockmasters' product offerings and strengthen its market reach, while allowing Signals Defense to broaden its capabilities and business development. The company plans to leverage this acquisition to introduce new products and enhance its market presence in specialized sectors, although specific product launch dates have not been disclosed.