Locks, tools, commercial hardware and specialty doors distributor Lockmasters — a portfolio company of Dominus Capital — acquired Astic Signals Defenses.

Terms of the transaction were not disclosed.

Based in Maryland, Signals Defense serves high security government and commercial applications with radio frequency and infrared (IR) shielding solutions. Established in 1999, the company’s window films meet the TEMPEST requirements for ICD-705 and the DoD Infrared and Radio Frequency Emanation Protection Standards.

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Founded in 1955, Lockmasters supplies locks, tools, commercial hardware, specialty doors and training to security professionals and the government sector. Based in Nicholasville, KY, the company serves various markets, including automotive, banking, commercial, government and industrial, with a wide range of products and educational programs. Lockmasters has additional locations in Annapolis Junction, MD; Oxford, MI; Plano, TX; Charlotte, NC; Hamden, CT; Las Vegas, NV; and Owings Mills, MD.

Lockmaster said its merger with Signals Defense combines high-security products and training for government SCIFs and commercial markets. This is Lockmasters’ fifth acquisition under Dominus’ ownership, expanding its proprietary offerings.

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“Together, we will offer an unmatched portfolio of high-security solutions for government and commercial customers,” Lockmasters CEO Joe McCormack said in an April 2 news release. “This acquisition reinforces our commitment to innovation and providing best-in-class security solutions to meet evolving threats, including an increased need for data protection.”