Building Shielding Solutions

Products designed for RF Protection,
IR Protection, Physical Security, Energy Savings,
and more

rf / ir window film

RF / IR Window Film

Signals Defense proprietary window films SD2500/SD2510 and SD1000/SD1010

rf ir foil

RF Foil

Ultra NT Radiant Barrier® rFoil™ for SCIF’s and Secure Work Environments

rf paint


Paints, Caulks, and Wallpapers for RF Shielding and RF Protection

decorative window film


Decorative, solar, safety, and cloaking window films



Glass and polycarbonate security solutions for eavesdropping mitigation



Commercial shades, blinds, shutters and custom window treatments



Governments and Commercial organizations need secure locations to handle sensitive and/or classified information. Our patented Signals Defense RF/IR Shielding window films  transforms ordinary spaces into secure spaces. Including transforming Conference rooms, offices, and data centers into secure spaces that meet TEMPEST standards for protecting electronic equipment from digital theft, accidental data leaks, and espionage.



Signals Defense is a privately held, company based in Owings Mills, MD, USA. We protect information and people by creating secure work environments.


Signals Defense sets the benchmark in RF/IR window films and shielding materials for Secure Work Environments, including SCIFs (Sensitive Compartmented Information Facilities). Safeguarding your assets and privacy by utilizing Signals Defense RF and IR window shielding technology ensures the protection of data stored, presented, and discussed within conference rooms or entire buildings.


DAS Shield window film for effective in-building wireless

Signals Defense, LLC was founded in Owings Mills, MD in 1999.  Our company began with the introduction of an innovative optically clear window film technology that provides high RF (Radio Frequency) and IR (Infrared) attenuation for RF Shielding, RF protection, and Thermal Imaging defense purposes.  Additionally, our Signals Defense patented window technology is engineered to meet stringent US Intelligence Community security requirements for facilities handling classified information.

SD technology is the de facto written standard for the US Government and for organizations desiring to properly secure locations handling sensitive and/or classified information, and our window films meet the TEMPEST requirement for the Intelligence Community Directive ICD 705 and the DoD Infrared and Radio Frequency Emanation Protection Standards. Furthermore, our SD technology has been deployed on over 3000+ locations providing our clients (including Government Intelligence agencies, DoD, and Fortune 100 companies) with US DoD emission security systems. Lastly, Signals Defense technology provides safety and energy benefits with UV and glass fragmentation/spall control and our technology can be laminated within glass, and polycarbonates.

RF Window Film for Enhanced SCIF Security

 Signals Defense  films meet the DOD standards for blocking RF and IR interference in SCIFs, offices, and facilities that handle confidential information.

 Our patented RF/IR shielding films and products help transform ordinary conference rooms, offices, and data centers into secure spaces that meet TEMPEST standards for protecting electronic equipment from digital theft, accidental data leaks, and espionage.

The US Government and commercial organizations that need secure handling of sensitive and/or classified information; choose Signals Defense.


Signals Defense partners with leading security and film companies across the globe:

  • Eastman Chemical Company

    Founded in 1920, Eastman is a global advanced materials and specialty additives company that produces a broad range of products found in items people use every day. Eastman is a leading manufacturer and marketer of high-performance window tint and paint protection film for automotive applications, window film for residential and commercial applications and the co-developer of the RF/IR attenuating “SD” window film products with Signals Defense. As a globally inclusive and diverse company, Eastman employs approximately 14,500 people around the world and serves customers in more than 100 countries. The company had 2019 revenues of approximately $9.3 billion and is headquartered in Kingsport, Tennessee, USA. For more information, visit

  • Covertech Fabricating, Inc

    Covertech manufactures rFoil Ultra NT Radiant Barrier Foils and tapes for SCIFs (Sensitive Compartmented Information Facilities) construction.  These highly effective radiant barrier products are also an approved vapor barrier.  Since 2016, Signals Defense has been a nationwide distributor of Covertech RF foils and tapes. Visit Covertech/rFoil 

  • AIT

    The AIT Group is a world leader in manufacturing and supporting architectural, security, ballistic, blast, impact, and decorative glass laminates, among other innovative materials.  They specialize in producing advanced combinations of materials and processing them to meet design and security needs for a variety of applications. Visit AIT

  • RF Defense

    RF Defense has experienced technicians that have over 20 years experience, and hundreds of facilities and products tested utilizing a unique approach to Shielding Effectiveness Testing. If you require Instrumented testing whether it is RF or STC, no one can beat RF Defense in practice and knowledge. Visit RFDefense today to schedule testing.

Signals Defense Logo

3 Easter Court

Suite L

Owings Mills, MD 21117

All images used on this website are licensed and comply with copyright standards.  Images licensed through Adobe Stock and courtesy of window treatment and product manufacturers including: Graber Blinds, Hunter Douglas, Faraday Systems, SWF Contract, Insolroll, Draper, and others.