Which material is commonly recommended for joint sealing in drywall?

Joint compound is the appropriate material used for sealing joints in drywall. It is specifically designed to fill gaps and create a smooth, even surface where drywall panels meet, providing both a functional and aesthetic finish. It adheres well to the drywall and can be sanded down after it dries to create a seamless appearance, making it ideal for finishing drywall installations.

While plywood, texture spray, and caulk all have their specific uses in construction and finishing, they are not typically employed for sealing drywall joints. Plywood serves as a structural material and is not flexible enough for joint sealing, texture spray is used for adding texture to walls rather than for joint treatment, and caulk is often used around windows and doors but is not the best choice for drywall seams where a stronger bond and a smooth finish are required. This makes joint compound the superior option for achieving the best results with drywall installations.