Caulking exterior windows requires careful preparation to ensure a proper seal. Start by cleaning the area around the window to remove any dirt, debris, or old caulk. Use a utility knife to cut away any old caulk. Apply a high-quality exterior caulk using a caulking gun, filling all gaps between the window frame and the exterior wall. Smooth the caulk with a caulk smoothing tool to ensure it is evenly applied and fully covers the gap. Allow the caulk to cure according to the manufacturer's instructions.

For exterior window caulking, clean and prepare the area, remove old caulk, apply exterior caulk, and smooth it out. Allow it to cure fully for the best seal. This prevents drafts and weather damage.