Abstract: Provided is a replaceable tip for communicating caulking from a reservoir of caulking. The reservoir is defined by a body having an opening and an external surface. The replaceable tip comprises: a) a flange operable to abut the external surface of the body; b) a conduit have a first portion and a second portion, the conduit extending through the flange and operable to enter the reservoir of caulking and operable to communicate caulking from inside the reservoir of caulking to outside the reservoir of caulking; and c) reversible sealing means for reversibly sealing the flange with the external surface of the body. When the reversible sealing means reversibly seals the flange with the external surface of the body, i) the flange prevents the first portion of the conduit from entering the reservoir; and ii) the second portion of the conduit is within the reservoir and aligns the conduit with the opening in the body thereby affecting communication with the reservoir.