Extreme duty sealant gun for DIY use

Caulking Gun has a history of nearly one hundred years since it came out, the traditional caulk gun rear push form determines that the size of the caulk gun must be twice the length of the silicone tube.  In this process, there has been no real improvement at all. This is particularly difficult to use for many narrow spaces, in addition to the length, weight, and easy storage are also problems to be solved. On the edge of Haifa, a coastal city in Israel, there is a small town called...