The AL122 CS applicator is a semi-automatic solution for sealing leaflets. Designed to apply pre-printed labels or seals on leaflets, this c-wrapping applicator allows an operator to seal flaps precisely and simply by inserting the folded leaflet in a guide where the seal is dispensed and applied in the desired position. The label or transparent seal would keep the flap folded and closed, guaranteeing its integrity and facilitating the insertion of the sheet into the package. Once the sealed leaflet is removed from the guide, the AL122 CS dispenses another seal waiting for the next leaflet to be positioned by the operator. The system is mounted on a desk base, and is equipped with a precision adjustable guide to handle leaflets of different thicknesses. The system can handle seals on a transparent-support, thanks to an ultrasonic sensor that measures seals' thickness and pitch.