Professional caulking gun with friction push mechanism, for greater precision. Force ratio 01:15, to maximize the force transmitted during application, extrusion of the product with minimum effort, smooth and durable feed and easy sealing in any position. Steel body for greater resistance and durability. For the application of high viscosity sealant cartridges (silicone, sealants, polyurethane fillers, . . .) in 300ml format.