SAMUEL® MANUAL SEALER HAND TOOL FOR PLASTIC STRAPPING The crimper hand sealer tool is a front action sealer with handles that are perpendicular to the strapping. For use on light to medium duty plastic strapping. Produces crimp joints. Produces high, consistent joint strength and the necessary friction to hold the joint when used with grit coated seals. Use with 4-0 or 4-c seals. Crimps the top and bottom of the seal by squeezing the seal flanges and the top of the seal.