Defender-Lok™ is a child-resistant, senior-friendly closure line designed for OTC and nutraceutical packaging that offers drop-in compatibility, high-speed performance, and lightweight, sustainable design.
Do more with less. Because getting it right—for your product and your customers—matters.
Defender-Lok™ integrates directly into existing capping and filling lines, reducing downtime and implementation costs. It also reduces feeder jams and sealing failures—streamlining line performance.
You get efficiency without compromise—because production reliability protects both operations and customers.
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— Chuck Newswanger, Director, Global Commercial Innovation and Technical Development-Pharmaceutical Packaging, Closure Systems International (CSI)
Trusted by leading OTC and wellness brands for over 90 years, CSI operates nine manufacturing sites across the U.S. Mexico, Costa Rica, China, and Japan.
Clean-room capable with in-house tooling and FSSC-22000 certified manufacturing.
CSI experts provide on-site technical service, line audits, and commercialization support—from spec alignment to validation runs. We know your validation process matters—and intentionally support it.
In-house R&D, certified labs, and dedicated CRC development ensure Defender-Lok™ outperforms legacy designs and meets evolving regulatory standards.
CSI’s Defender-Lok™ CRC product line can be made of PolyCycle PCR resin—produced from recycled content and fully recyclable. Defender-Lok™ closures made with PolyCycle PCR support sustainable packaging goals without sacrificing compliance, high-speed, or the high-quality standards your lines demand.
Contact our team to explore PolyCycle solutions for your next CRC application.
TOTAL STORE EXPO | SAN DIEGO CA
Looking to upgrade your CRC closures without disrupting production?
Contact our CRC team. We’re here to support your packaging goals, operations, and, ultimately, the customers who count on your product.
