Medi-Dose/ EPS‘ Steri-Tamp seals were specifically designed to protect IV bags, vials and syringes from tampering and contamination. When applied, the seal’s medical-grade foil outer layer provides immediate visible evidence of a needle puncture. Removal of the outer layer leaves a printed “OPENED” warning on the container that immediately alerts practitioners that the medication has been accessed. Once removed, the seal can’t be reapplied.