A caulking gun is a hand-held tool used to apply sealants, adhesives, and caulk. It typically features a trigger mechanism that pushes a tube of material forward, allowing for precise application along seams, gaps, or joints. This tool is commonly used in construction and home improvement projects to seal windows, doors, and other areas to prevent air and water leaks. The caulking gun is designed to hold standard-sized tubes of caulk, which can be made from various materials, including silicone, latex, and polyurethane. Proper use of a caulking gun can enhance the durability and appearance of repairs, making it an essential tool for both professionals and DIY enthusiasts.