Caulking windows from inside involves preparing the interior window area for sealing. Start by cleaning the window frame and removing any old caulk or paint with a utility knife. Use a vacuum or brush to remove any dust or debris. Apply a bead of caulk along the gap where the window frame meets the wall. Smooth the caulk with a caulk smoothing tool or your finger to ensure it is evenly applied. Wipe away any excess caulk before it dries. Allow the caulk to dry as recommended by the manufacturer for optimal performance.

To caulk windows from inside, clean the area, remove old caulk, apply a bead of caulk, and smooth it out. Wipe excess and let it dry completely. This helps seal gaps and improve insulation.