We turned it into reality. After eight years of uninterrupted research, we invented the world's first caulk gun with rod-less design, which is one sixth of the length of the traditional caulk gun. We call it Siligun. Most of the Siligun body is made of tough plastic, and it is also the lightest glue gun at present. Ideal for applying latex, acrylic and silicone caulks and more in tight spaces.