Abstract: A universal bag sealer system including an elongated sealing strip including a front-panel, a rear-panel, a sealing mechanism, pressure-sensitive adhesive sections, and a removeable cover. A cutting tool and a template are provided for use in combination with the elongated sealing strip. A sealing mechanism extends horizontally along a length of the elongated sealing strip. The elongated sealing strip includes a set of locking tracks structured to align and releasably interlock. The rear-panel of the elongated sealing strip is configured to be secured to an exterior surface of a host-bag via the pressure-sensitive adhesive sections forming an airtight seal. Contents of the host-bag may be accessed via opening of the sealing mechanism and alternatively sealed by engaging the sealing mechanism.