This caulking gun is used for easily applying silicone, sealant and caulk The Draper 15630 Triple Rod Applicator Gun has been manufactured with a heavy-duty steel frame attached to a triple plunge rod. It delivers an impressive 16:1 ratio for easily and efficiently applying substances such as caulk, silicone and sealant in a number of applications. Features: Expert quality applicator gun manufactured with a heavy-duty steel frame attached to a triple plunge rod Delivers an impressive 16:1 thrust ratio Ideal for use with polyester resins and other similar viscosity materials Specification: Capacity: 380ml