Construction plaster with the chemical formula H2O 1/2 CaSO4 is a construction adhesive material (air adhesive) which is white when it is pure. Construction plaster is obtained by baking gypsum stone at a low temperature (about 180 degrees Celsius in laboratory conditions). Id. Gypton plaster or construction plaster coating for coating with modified surface hardness is construction plaster coating. which is specially designed to meet the requirements of plating with modified surface hardness. This type of plaster is used in covering concrete surfaces. The amount of plaster used in this type of coating is at least 50%. Gypton gypsum is placed in category G-7 of ready-made plaster coatings according to 12015-1 standard.