SINIAT Mastalongset Setting Compound is a hard-setting, plaster-based bedding cement designed for embedding tape in recessed edges and butt joints. With a 65-minute working time and 80-minute set time, it’s ideal for mechanical jointing tools and larger plasterboard projects.
Mastalongset mixes to a smooth, creamy consistency for easy hand or machine application, delivering excellent body on the trowel and hawk. Suitable for second coats, internal and external angles, and fastener heads, it provides strong joint performance with minimal waste. All Siniat finishing compounds can be applied over Mastalongset for a professional final coat.
