This video shows the application of sealant along roof tile joints using a cordless caulking gun, also known as an electric caulking gun. The tool pushes sealant from the cartridge through the nozzle with controlled pressure. An electric motor drives the pushing rod, allowing the sealant to flow steadily as it is applied along gaps and joints between the roof tiles. This helps create a more consistent seal compared with a manual caulking gun. Swipe or use ↑ ↓ to keep watching.