PlasterStop is a specialized corner bead or edge protection system used in drywall (gypsum board) installations, primarily for protecting vulnerable areas such as external corners, door and window reveals, and ceiling edges. Typically made from galvanized steel, PlasterStop features perforations or textured surfaces that allow joint compound to adhere securely. Its main purpose is to reinforce corners against impact and wear, prevent cracking or damage from knocks, and ensure a smooth, clean finish.