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Spackling paste or spackle is a putty used to fill holes, small cracks, and other minor surface defects in wood, drywall, and plaster. [1] [2] Typically, spackling is composed of gypsum plaster from hydrated calcium sulfate and glue.
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.
Plaster was first used as a building material and for decoration in the Middle East at least 7,000 years ago. In Egypt, gypsum was burned in open fires, crushed into powder, and mixed with water to create plaster, used as a mortar between the blocks of pyramids and to provide a smooth wall facing.
The main use of calcium sulfate is to produce plaster of Paris and stucco. These applications exploit the fact that calcium sulfate which has been powdered and calcined forms a moldable paste upon hydration and hardens as crystalline calcium sulfate dihydrate.
Kitchen renovation spackling to cover holes and tape between sheetrock boards Drywall with joint compound applied.. 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 when dry to create a seamless base for paint ...
In 1909, Avery led the USG acquisition of the Sackett Plaster Board Company, [13] inventor of Sackett Board, which was a panel made of multiple layers of plaster and paper. Patented by USG in 1912, a new manufacturing process produced boards with a single layer of plaster and paper that could be joined flush along a wall with a relatively ...