What are the common seal and closure defects in injectables?

Seal and closure defects are failures of the stopper, cap, or crimp that seals the container. The main types are tampered or different seals and improper sealing.

Closure defects are critical because the seal maintains sterility and container closure integrity throughout shelf life. A tampered or different seal means the wrong closure, a disturbed seal, or evidence of tampering; improper sealing covers loose, missing, raised, or incompletely crimped caps and partially seated stoppers. Because a compromised seal can admit microbial or gas ingress without any visible particle, these defects are inspected alongside dedicated container closure integrity testing.

FTI's challenge sets include tampered-seal and improper-sealing units so inspectors are qualified to catch closure defects, and FTI's CCIT challenge kits and laser-drilled positive-control standards verify that leak-detection methods catch the integrity failures the eye cannot.