Spackle is a type of paste used for filling holes, cracks, and imperfections in walls and ceilings. It is commonly made from a mixture of gypsum powder, binders, and water, which allows it to dry quickly and create a smooth surface. Spackle is often used in home improvement projects to prepare surfaces for painting or wallpapering. When applying spackle, it is typically spread over the damaged area with a putty knife. Once it dries, it can be sanded down to achieve a flat finish. Spackle is available in various formulations, including lightweight and heavy-duty options, to suit different repair needs.