While using this gun, it worked fine. The problem was when the tube is supposedly empty. When the cartridge is removed, globs of the adhesive is at the base of the outside of the cartridge. I thought that it was a faulty cartridge, but it did the same thing again with a new cartridge. Huge mess....huge waste. A friend showed me that the fault was not the tool, but that I had not cut the top off with a wide enough opening for the adhesive to come out and was forced out of the bottom. My error...not the tool.