This is a quick video showing the insertion of backer rod, loading a bulk gun, and applying the sealant. Note:
1. The backer rod tool places the backer rod at a fixed depth and inserts the backer rod quickly. (This is a bit of an ideal joint, most joints are not a fixed width with nice edges, but this tool does improve the installation of backer rod.)
2. Putting a slight film of oil will help keep the material from sticking to the outside of the barrel.
3. Cordless provides a smooth continuous flow of material. (This applicator is running the tool a bit on the slow side, he could easily have doubled his speed. I guess that is the difference between an Engineer and someone who seals joints for a living.... the Engineer is too careful and slow.)
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