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A bag seal is a closure device or method—such as a plastic tie, adhesive strip, clip, or heat-welded edge—designed to securely fasten the opening of a bag, keeping contents intact and protected from spills, contamination, or unauthorized access. Commonly used in packaging, shipping, and storage, modern bag seals often feature tamper-evident designs that show if they've been opened. They're essential in industries from food service to forensics for reliability and convenience.
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