What is commonly used to fill nail dimples or screw indentations on finished drywall?

Joint compound is the typical material used to fill nail dimples or screw indentations on finished drywall. This product is a thick paste that, when applied accurately, can create a smooth and even surface over the fasteners once they have been installed. After the joint compound dries, it can be sanded down to ensure a seamless finish that blends in with the surrounding drywall, making it less visible and creating a professional appearance. This step is crucial in drywall finishing, especially before painting or applying any other surface treatment.

Caulk is intended for sealing gaps and joints but is not the right substance for filling indentations. Drywall tape is primarily used to reinforce joints between sheets of drywall and is not designed for filling in holes. Spacer strips are utilized during the installation of drywall to maintain proper space or level, but they have no role in the finishing process of nail or screw heads. Therefore, joint compound is the most appropriate choice for achieving a clean and polished look on drywall surfaces after installation.