Water activated reinforced Kraft gummed tape is the most secure way to seal a carton for shipping. Overstuffed, under-stuffed boxes put stresses on the carton flaps and gummed tape creates a permanent bond with the carton fibers. With H sealing your box is even more secure and vermin proof.
Electronic tape dispensers will measure, dispense and cut at the touch of a button. Some models have automatic dispensing and one model can be adapted with a scanner to read bar codes to automatically dispense the tape needed.