A hot glue stick is a cylindrical rod made from thermoplastic adhesive, commonly used in craft applications and repairs. When heated in a glue gun, it melts and can be applied to various surfaces including wood, fabric, metal, and plastic. After cooling, it forms a strong bond that is both durable and flexible. The glue stick typically has a transparent or slightly opaque appearance, exhibiting a smooth texture. It is designed for easy feeding into glue guns, allowing for quick and efficient application of glue.