strong materials made quality caulking gun for soft pack silicone sealant or sausage use;
strong pushing system to insure with big thrust to push the silicone sealant;
strong metal screw to control the joint is strong enough when pushing the silicone sealant;
strong pushing disks full sealed plastic disks to ensure no slilicone sealant drip in the aluminum barrel when squezzing the
trigger;