the invention is related to the structure of an adhesive dispenser that is composed of an outer tube with a push rod and a handle . the apparatus uses a certain number of elastic elements to make relative displacement between push rod and outer tube , while it uses the locking end of the push rod and cotter groove to perform functions like locating , acceleration and stepwise movement , which makes easy operation for the users . moreover , in the apparatus the outer tube can be equipped with an inner tube . so the spacing between inner tube and outer tube provides a mechanism that the sealant and adhesive filled in - between the inner and outer tube will flow out and mix under the motion of the push rod . this mechanism will not only facilitate sealing , adhesion and hardening prevention , but will also provide reusability .