Setting type comes only in powdered form and are mixed with water immediately before use. Drying-type compound and all materials should be used at temperatures above 55 ☏ (13 ☌). Drying-type joint compound is usually more forgiving than setting type joint compound and can be used for as long a period as needed while not dry or frozen. Drying-type joint compounds are vinyl based and harden by evaporation. Types Drying ĭrying-type comes in ready-mix or powdered form. This type of joint compound is commonly referred to as "hot mud" due to the exothermic reaction that takes place when the powder is mixed with water. Powdered drying or setting-type compounds are available in similar combinations and consistency as the ready-mix. Powdered joint compound is mixed with water immediately before use. The compound is a complex combination often including water, limestone, expanded perlite, ethylene-vinyl acetate polymer, attapulgite, and other ingredients. Ready-mix joint compound is a pre-made joint compound of drying type only designed for fast application and easy maintenance. The similarities and differences are discussed at Spackling paste § Comparison with joint compound. Joint compound is comparable and contrastable with spackling paste. Until the last century, several different plasters such as veneer plaster and " plaster of Paris" have been used in similar ways to joint compounds as fillers or for decorative purposes since ancient times, and the actual make up, and working properties of these compounds is much similar. Ī similar compound is used in sprayed-on textural finishing for gypsum panel walls and ceilings that are pre-sealed and coated with a joint compound. Joint compound type and formula selection forms part of a drywall system that can be finished anywhere from a level 0 to a level 5, where 0 is not finished in any fashion, and 5 is the most pristine. In North America, troweling joint mud on gypsum panels is a standard construction technique prior to painting wall and ceiling surfaces. It is also convenient for patching holes, bumps, tears, and other minor damage to existing walls. Joint compound is used to finish gypsum panel joints filled with paper or fiber joint tape, corner bead, trim and fasteners, and to skim coat. When used for new walls, joint compound effectively eliminates blemishes from the surface of drywall, such as fasteners, damage, or drywall tape. Joint compound (also known as drywall compound, drywall mud, joint cement or mastic) is a white powder of primarily gypsum dust mixed with water to form a paste the consistency of cake frosting, which is spread onto drywall and sanded after dry to create a seamless base for paint on walls and ceilings. Kitchen renovation spackling to cover holes and tape between sheetrock boards Drywall with joint compound applied.
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